The Lin Biao Affair and Project 571

In the pitch-black, freezing early morning hours of September 13, 1971 CE, across the desolate, windswept grasslands of Öndörkhaan (温都尔汗) in northeastern Mongolia, several hundred miles north of the Chinese border, a British-built Hawker Siddeley Trident 1E passenger jetliner bearing the insignia of the Civil Aviation Administration of China (CAAC Aircraft No. 256) roared low over the dark desert scrub. Flying without radar guidance, landing lights, or a co-pilot, its fuel tanks virtually bone-dry after a panicked, high-speed flight from China, the jet descended toward a flat gravel basin.

At 2:27 AM, the right wingtip struck the earth at over two hundred miles per hour. The heavy aircraft cartwheeled violently across the steppe, disintegrating in an apocalyptic fireball that illuminated the Mongolian night sky for miles around. When local nomadic herdsmen and Soviet military investigators from the 39th Army arrived at dawn, they found a gruesome scene of smoking wreckage strewn across a kilometer of scorched earth. Nine charred corpses were scattered in the grass. Among the twisted metal lay personal belongings: a silver pistol, a flight chart, and broken dentures. One of the bodies—a frail, balding, sixty-three-year-old man—belonged to Marshal Lin Biao (林彪, 1907–1971 CE): the Vice-Chairman of the Chinese Communist Party, Minister of National Defense, legendary military architect of the communist victory in the Chinese Civil War, and the constitutionally designated, infallible successor to Chairman Mao Zedong (毛泽东, 1893–1976 CE).

Beside him lay the burned remains of his formidable fifty-three-year-old wife, Ye Qun (叶群), and his brilliant, twenty-six-year-old son, Lin Liguo (林立果, nicknamed ‘Tiger’ 老虎), Deputy Director of the Operations Department of the PLA Air Force. The flight and fiery demise of the designated successor—known to modern Chinese history as the ‘September 13 Incident’ (九一三事件)—was the most sensational, traumatic, and closely guarded political crisis of the entire Maoist era.

Barely two years earlier, in April 1969, at the Ninth National Congress of the CCP, Lin Biao’s position as Mao’s sole heir had been uniquely codified into the Party Constitution, hailing him as Mao’s ‘Close Comrade-in-Arms and Intimate Successor’ (亲密战友和接班人). Lin was the man who had compiled the Little Red Book (Quotations from Chairman Mao), turned the People’s Liberation Army into a school of Mao Zedong Thought, and stood at Mao’s right hand atop Tiananmen Gate reviewing millions of hysterical Red Guards. Yet behind the monolithic façade of totalitarian unity, a lethal struggle for supreme power had erupted between the aging despot and his ambitious military faction.

When Mao moved to systematically dismantle Lin’s power base following the tempestuous 1970 Lushan Conference, Lin Liguo and a cabal of radical young air force officers formed a secret coup cell dubbed the ‘Joint Fleet’ (联合舰队, Lianhe Jiandui). In March 1971, they drafted an astonishing, clandestine coup manual titled the ‘Project 571 Outline’ (《“571”工程纪要》)—a document that contained the most devastating, unsparing condemnation of Mao Zedong’s tyranny ever written in the twentieth century, branding Mao a ‘contemporary Qin Shi Huang’ (当代秦始皇) who had converted China into a socialist concentration camp. When their desperate plots to assassinate Mao’s special train collapsed in September 1971, the Lin family fled into the night in a frantic bid to reach the Soviet Union, meeting their doom in the Mongolian desert.

The Lin Biao Affair was the psychological turning point of the Great Proletarian Cultural Revolution (无产阶级文化大革命). For five years, eight hundred million Chinese citizens had been taught that Chairman Mao was a living god whose judgment was supernatural and infallible. Suddenly, his chosen successor was officially unmasked as a traitor, spy, and would-be assassin who had tried to murder the Chairman. The revelation produced a profound, unhealable existential shockwave across the nation. It shattered the religious cult of Mao Zedong, awakened an entire generation of disillusioned youth, and opened the intellectual path toward the historic post-Mao reforms of Deng Xiaoping.

This monograph provides an exhaustive political, military, psychological, and forensic reconstruction of the Lin Biao Affair and Project 571. We will explore Lin Biao’s meteoric rise during the civil war and the Korean War; dissect the ideological clash at the 1970 Lushan Conference over the State Presidency and the ‘Genius Theory’; analyze the conspiratorial formation of Lin Liguo’s Joint Fleet and the secret text of the Project 571 Outline; reconstruct Mao’s perilous August 1971 southern tour and the failed assassination attempts; detail minute-by-minute the dramatic midnight flight from the seaside resort of Beidaihe; examine the forensic investigation of the Trident crash at Öndörkhaan; document Zhou Enlai’s emotional collapse; analyze the bizarre ‘Criticize Lin Biao, Criticize Confucius’ campaign; and evaluate the profound historiographical legacy of the crisis that broke the spell of the Cultural Revolution.

1. The Golden Heir: Lin Biao’s Rise to Constitutional Successor (1959–1969)

To comprehend the cataclysmic shock of the September 13 Incident, one must first appreciate the extraordinary stature that Marshal Lin Biao had cultivated within the pantheon of Chinese Communism. Born in Hubei in 1907, Lin graduated from the Whampoa Military Academy at age eighteen, joined the Communist Party, and emerged as the most brilliant tactical field commander of the Red Army during the Long March and the War of Resistance Against Japan (directing the famous victory at Pingxingguan in 1937).

During the Chinese Civil War (1946–1949), Lin Biao transformed the ragtag guerrilla forces in Manchuria into the one-million-strong Northeast Field Army (Fourth Field Army), crushing Chiang Kai-shek’s elite divisions at Liaoshen and sweeping south to the borders of Vietnam. Revering Lin’s tactical genius, Mao affectionately referred to him as his ‘Invincible General’ (常胜将军).

Lin’s political ascent began in earnest at the tragic 1959 Lushan Conference. When Defense Minister Marshal Peng Dehuai (彭德怀) courageously criticized the catastrophic human and economic devastation of Mao’s Great Leap Forward, Mao purged Peng as an ‘anti-party conspirator’. Mao appointed the hypochondriac, reclusive Lin Biao as Minister of National Defense and First Vice-Chairman of the Military Affairs Commission.

Lin Biao recognized that his absolute political survival depended upon total, unreserved fealty to Mao. Beginning in 1960, Lin systematically transformed the People’s Liberation Army into the spiritual incubator of the Mao Cult (毛泽东崇拜):

• The Creation of the Little Red Book: In May 1964, Lin’s General Political Department compiled and distributed the first pocket-sized red plastic edition of Quotations from Chairman Mao Zedong (毛主席语录) to all soldiers, ordering them to ‘Study Chairman Mao’s writings, follow his teachings, act according to his instructions, and be his good fighters.’ Over one billion copies were eventually printed.
• The ‘Four Firsts’ and Revolutionary Martyrs: Lin established the ‘Four Firsts’ (四个第一) ideological doctrine and elevated self-sacrificing PLA soldiers, most notably the saintly Lei Feng (雷锋), into national moral icons of unconditional obedience to Mao.
• The Deification of Mao: Lin coined the famous formulation that Mao Zedong Thought was the ‘zenith of contemporary Marxism-Leninism’, declaring: ‘Chairman Mao is a genius of world revolution. Every sentence he speaks is the truth; one sentence of his equals ten thousand sentences of ours!’

When Mao unleashed the Cultural Revolution in 1966 to purge President Liu Shaoqi and General Secretary Deng Xiaoping, the civil apparatus of the Communist Party collapsed into violent factional chaos. Mao called upon Lin Biao and the PLA to step into the administrative void, establishing military control over provincial Revolutionary Committees. At the Ninth National Congress of the CCP in April 1969, Lin reached the absolute pinnacle of power. The Party Constitution was uniquely amended to formally codify Lin Biao as Mao’s sole, designated successor. In the eyes of the world, Lin Biao was second only to the Great Helmsman himself.

2. Tempest on the Mountaintop: The 1970 Lushan Conference and the ‘Genius’ Debate

The zenith of Lin Biao’s constitutional triumph concealed the seeds of his inevitable destruction. In the totalitarian court of Mao Zedong, the designated successor was perpetually the most dangerous and precarious position in the realm. As Mao grew increasingly paranoid in his late seventies, he began to view Lin Biao’s massive military faction—which controlled the Ministry of National Defense, the PLA General Staff, the Air Force, and the Navy—with growing suspicion and fear.

The political fissure erupted into the open during the Second Plenum of the Ninth Central Committee, convened in August 1970 at the scenic mountain resort of Lushan (庐山) in Jiangxi Province. Two contentious, seemingly arcane ideological issues detonated the crisis:

1. The Re-establishment of the State Chairman (国家主席): Following the purge and horrific death of President Liu Shaoqi in Kaifeng, the constitutional position of Head of State had remained vacant. Mao Zedong repeatedly stated that he did not wish to serve as State Chairman, and proposed that the post be formally abolished in the new Draft Constitution. However, Lin Biao and his key generals—Chief of General Staff Huang Yongsheng (黄永胜), Air Force Commander Wu Faxian (吴法宪), Navy Commissar Li Zuopeng (李作鹏), and Logistics Director Qiu Huizuo (邱会作) (known collectively as the ‘Four Great Generals’)—firmly insisted that the state required a Chairman. Lin Biao argued that if Mao declined the post, Lin himself, as the constitutional successor, should occupy it. Mao immediately suspected that Lin was impatient to usurp supreme executive authority, famously remarking: ‘Someone wants to be State Chairman; they are in a hurry to seize power!’

2. The ‘Genius Theory’ (天才论) and the Purge of Chen Boda: At Lushan, Lin Biao’s close ideological ally, Marxist theoretician and Politburo Standing Committee member Chen Boda (陈伯达, 1904–1989 CE), delivered impassioned speeches praising Mao’s supernatural ‘genius’. Chen and Lin’s generals orchestrated a coordinated verbal assault against Zhang Chunqiao (张春桥), a leading member of Jiang Qing’s radical Cultural Revolution Group (later known as the Gang of Four), accusing Zhang of being a disloyal counterrevolutionary who had dared to question the term ‘genius’.

Recognizing that Lin’s military generals were attempting to crush Jiang Qing’s Shanghai faction and isolate him, Mao struck back with terrifying fury. On August 31, 1970, Mao penned his famous memorandum, ‘My Views’ (我的一点意见). Mao denounced Chen Boda as a ‘sham Marxist, political swindler, and careerist’, stripping him of all offices and placing him under house arrest. Mao forced Lin Biao’s four top generals to undergo grueling, humiliating self-criticisms for their factional maneuvering at Lushan.

Over the subsequent nine months, Mao executed a masterly, classical campaign to undermine Lin Biao’s power base, which Mao described using three agricultural metaphors: ‘Throwing Stones’ (甩石头) (issuing sharp critical comments to dismantle their prestige); ‘Mixing Sand’ (掺沙子) (appointing loyalist cadres into the Military Affairs Commission to dilute Lin’s control); and ‘Digging Up the Corner of the Wall’ (挖墙脚) (reorganizing the leadership of the Beijing Military Region to ensure the capital garrison reported directly to Mao).

3. The Joint Fleet: Lin Liguo and the Radical Young Officers

As Mao systematically tightened the political noose around Lin Biao throughout the winter of 1970–1971, Lin Biao’s household descended into dark, fatalistic paranoia. Lin himself, plagued by chronic respiratory illnesses, phobias of water and drafty air, and severe clinical depression, spent days sitting motionless in darkened rooms at his residence in Maojiawan in Beijing, largely disengaged from administrative reality.

The operational initiative was seized by his ambitious, fiercely protective wife, Ye Qun, and their twenty-six-year-old son, Lin Liguo. Educated at Peking University’s physics department, Lin Liguo had been commissioned directly into the PLA Air Force in 1967. Within two years, through blatant nepotism orchestrated by Air Force Commander Wu Faxian, Lin Liguo was appointed Deputy Director of the Air Force Operations Department. Wu Faxian sycophantically proclaimed that Lin Liguo possessed supernatural military genius, issuing an extraordinary directive: ‘Everything in the Air Force must be reported to Comrade Liguo, and everything must be directed by Comrade Liguo!’

Surrounded by a cadre of educated, Westernized young air force officers—including Zhou Yuchi (周宇驰), Yu Xinye (于新野), and Liu Peifeng (刘沛丰)—Lin Liguo formed a clandestine conspiratorial cell. Drawing inspiration from the imperial Japanese naval tradition and modern military thrillers, Lin Liguo named the secret organization the ‘Joint Fleet’ (联合舰队, Lianhe Jiandui), with himself serving as ‘Commander-in-Chief’ and Zhou Yuchi as ‘Chief of Staff’.

Unlike the older generation of Long March marshals who revered Mao despite his purges, Lin Liguo and his young cohort had grown up during the Cultural Revolution and harbored zero romantic illusions about the Chairman. They viewed Mao not as a divine leader, but as a paranoid, bloodthirsty tyrant who systematically devoured his closest comrades one by one. In secret gatherings at the Air Force guest house in Shanghai and the secret command bunker at Xijiao Airfield in Beijing, the Joint Fleet concluded that if they did not strike first, Lin Biao and his entire family would share the horrific, agonizing fate of Liu Shaoqi and Peng Dehuai.

4. Project 571: The Anatomy of a Coup Manual

Between March 21 and 24, 1971, inside a secluded villa on Jufulu in Shanghai, Lin Liguo, Yu Xinye, and Li Weixin drafted the operational blueprint for an armed coup d’état. They titled the handwritten twenty-four-page document the ‘Project 571 Outline’ (《“571”工程纪要》). In Chinese military phonetics, the numbers ‘5-7-1’ (Wu-Qi-Yi) are a direct homophone for ‘Armed Uprising’ (武起义, Wuqiyi).

When the Project 571 Outline was declassified and published by the CCP Central Committee following Lin’s death, it stunned the Chinese nation. Far from being a petty factional diatribe, the document contained the most penetrating, articulate, and devastating systemic critique of Mao Zedong’s rule produced from within the highest echelons of the Communist state:

‘He is not a true Marxist-Leninist; rather, he is the greatest feudal despot in Chinese history, who wraps himself in the skin of Marxism-Leninism while practicing the laws of Qin Shi Huang! He is a contemporary Qin Shi Huang (当代秦始皇) … Today he uses this group to attack that group; tomorrow he uses that group to attack this group. Today he speaks sweet words of praise to you; tomorrow he casts you into prison on trumped-up charges! All who have served as his closest comrades have ended up destroyed: Liu Shaoqi, Peng Dehuai, He Long! His ruling apparatus is a meat-grinder (绞肉机), and anyone who enters it will be ground to dust!’

— Project 571 Outline (《“571”工程纪要》), March 1971

The document systematically exposed the catastrophic suffering inflicted upon the Chinese people by the Cultural Revolution:

• The Fate of the Youth: The sending down of millions of educated urban youth to rural communes (the Shangshan Xiaxiang movement) was unmasked not as revolutionary education, but as ‘Disguised Labor Reform’ (变相劳改) designed to solve urban unemployment and crush student independence.
• The Fate of the Cadres: The banishment of senior party veterans to May Seventh Cadre Schools was branded as ‘Disguised Unemployment’ (变相失业) and political humiliation.
• The Living Standards of the Masses: The document noted that while state propaganda boasted of glorious triumphs, ‘the peasants lack food and clothing, workers are exploited under frozen wages, and the national economy has stagnated!’

The operational plan outlined two scenarios for seizing power: a ‘peaceful transition’ through political maneuvering, or a violent strike code-named ‘Special Action’ (特种行动). The conspirators proposed utilizing the Air Force’s elite fighter squadrons, helicopter units, and specialized assault teams to assassinate Mao during his travels, seize communication networks, and mobilize support from regional military commands and even clandestine coordination with the Soviet Union.

5. The Southern Tour of August 1971: The Net Closes

In mid-August 1971, Chairman Mao made a sudden, decisive move to prepare the ground for Lin Biao’s political destruction. Boarding his private armored train, Mao embarked on a secretive, month-long inspection tour of southern China, visiting Wuhan, Changsha, Nanchang, and Hangzhou.

At every stop, Mao summoned regional PLA commanders and provincial party secretaries—including Ding Sheng (Guangzhou Military Region), Xu Shiyou (Nanjing Military Region), and Wang Liusheng (Wuhan Military Region)—to private, closed-door conferences inside his railway carriage. Mao spoke with chilling frankness, unmasking the factional maneuvering at the Lushan Conference: ‘A struggle between two lines occurred at Lushan! The problem of Lushan is not finished yet; Chen Boda was merely the front man. What is behind Chen Boda? Someone wanted to become State Chairman! We must not set up a State Chairman! Someone blew a gale of the eighth rank at Lushan!’

Mao’s words were a clear signal to the regional military commanders: Lin Biao was marked for destruction, and they must immediately pledge their personal loyalty to the Chairman. Crucially, secret transcripts of Mao’s speeches were leaked by regional cadres to Lin Liguo in Beijing.

Recognizing that Mao intended to convene the Third Plenum upon his return to Beijing to publicly purge Lin Biao and his generals, Lin Liguo panicked. Between September 8 and 11, Lin Liguo and his Joint Fleet conspirators launched desperate, amateurish assassination plots targeting Mao’s special train: plotting to attack the train with flame-throwers and anti-aircraft guns, or detonate the Shuofang Railway Bridge near Suzhou as the train crossed.

Yet Mao possessed the supernatural survival instincts of an ancient warlord. Sensing unusual military movements and telephone traffic along the railway line, Mao abruptly altered his schedule. Bypassing planned stops, Mao ordered his train to steam northward through Shanghai and Jinan without stopping, arriving safely at the Fengtai station in the western suburbs of Beijing on the afternoon of September 12. Lin Liguo’s assassination plot had completely collapsed.

6. Panic at Beidaihe: The Midnight Flight of Trident 256

When news reached Lin Liguo that Mao had returned safely to Beijing, hysterical panic erupted inside the Lin family villa (Building 96) at the seaside resort of Beidaihe (北戴河) on the Bohai coast, where Lin Biao and Ye Qun were resting. Recognizing that their assassination attempt had failed and that the state security apparatus would close in within hours, Ye Qun and Lin Liguo decided to flee.

Their original plan was to board Trident Aircraft No. 256, fly south to Guangzhou, establish a rival ‘Southern Central Committee’ with loyalist military units, and declare open rebellion against Beijing, using the British colony of Hong Kong as an escape valve. However, their desperate plotting was betrayed from within their own family.

Lin Biao’s twenty-seven-year-old daughter, Lin Dou-dou (Lin Liheng, 林立衡), who was deeply alienated from her mother Ye Qun and brother Lin Liguo, overheard their frantic discussions about boarding the plane. Devoted to Chairman Mao and fearing that her mother was kidnapping her sickly father, Dou-dou secretly alerted the Central Security Bureau (Unit 8341) guards stationed at the villa at 10:30 PM on September 12. Unit 8341 immediately contacted Premier Zhou Enlai at Zhongnanhai.

Operating with icy administrative mastery, Zhou Enlai placed all military airfields on immediate nationwide lockdown, grounding every civil and military aircraft in China. Zhou phoned Ye Qun at Beidaihe, probing whether the family intended to travel. Sensing that the net had closed, Ye Qun screamed: ‘We must leave now! We cannot wait for daylight!’

At 11:50 PM, in scenes resembling a Hollywood thriller, a heavily armored Red Flag limousine (CA770) carrying Lin Biao, Ye Qun, Lin Liguo, and driver Yang Zhengang roared out of the Beidaihe compound gates at breakneck speed. PLA Unit 8341 guards attempted to block the gate; Lin Liguo fired his pistol out the window, wounding a guard, while the heavy limousine smashed through the wooden checkpoint barriers.

Racing twenty miles along the coastal road to Shanhaiguan Airfield, the limousine screeched onto the tarmac at 12:22 AM on September 13. Trident 256 was parked under the moonlit sky. Because Zhou Enlai’s grounding order had arrived, the airport lights were extinguished, the mobile boarding stairs had been removed, and the auxiliary flight crew—including the co-pilot, navigator, and radio operator—were sleeping in barracks.

Shouting at the lone pilot, thirty-seven-year-old Division Deputy Commander Pan Jingyin (潘景寅), Lin Liguo and Ye Qun scrambled up a makeshift steel ladder into the cabin. With only thirty tons of fuel—less than half the capacity required for long-distance flight—and with its cabin door hastily secured, Trident 256 taxied onto the dark runway. At 12:32 AM, without runway illumination, the three-engine jet roared down the tarmac, clipped an oil truck parked beside the runway, and lifted into the pitch-black sky.

In Beijing, air defense radar operators watched in frozen disbelief as the green blip of Trident 256 tracked northwest across Inner Mongolia, heading straight toward the Soviet Union. PLA Air Force generals begged Chairman Mao and Premier Zhou for permission to scramble supersonic J-6 interceptors or fire surface-to-air missiles to shoot down the escaping aircraft. Mao calmly waved his hand and uttered the famous, fatalistic classical phrase:

‘The sky wants to rain, and the widow wants to remarry; there is nothing one can do to stop it. Let him go!’ (天要下雨，娘要嫁人，由他去吧！)

— Chairman Mao Zedong, Zhongnanhai, September 13, 1971

Two hours later, over the bleak Mongolian wilderness of Öndörkhaan, Trident 256 exhausted its fuel, crashed, and was consumed by fire.

7. Forensic Revelations: The Mongol-Soviet Autopsy at Öndörkhaan

For weeks after the crash, absolute silence reigned in Beijing. Mao Zedong, severely shaken by the betrayal of his chosen heir, suffered a mild stroke and was bedridden. Premier Zhou Enlai, tasked with managing the crisis, ordered the arrest of Lin Biao’s ‘Four Great Generals’ and grounded the entire PLA Air Force.

Meanwhile, in the Mongolian steppe, a high-level joint team of Soviet KGB forensic experts, led by General Alexander Zagvozdin and military coroner Vitaly Tomilin, arrived at the crash site. The Soviets secretly exhumed the bodies buried in shallow graves. To verify the identity of the corpse beyond doubt, Soviet coroners severed the heads of Lin Biao and Ye Qun, boiled them in ceramic vats to strip away the flesh, and transported the skulls to Moscow.

At the secret Institute of Forensic Medicine in Moscow, Soviet pathologists compared the dental records and skull dimensions with medical files dating back to Lin Biao’s stay in Moscow during World War II (where Lin had been treated for battle wounds between 1938 and 1942). The match was conclusive: dental bridge work and historic scar tissue on the lung from a 1938 Nationalist friendly-fire gunshot wound proved with 100 percent certainty that Body No. 3 was Marshal Lin Biao. The KGB quietly stored Lin Biao’s skull in the archives of the Lubyanka.

1a. The Household of Whispers: Lin Biao’s Phobias and the Tyranny of the ‘Lin Office’

Behind the glittering military prestige of Marshal Lin Biao lay a bizarre, pathetic private world governed by severe psychosomatic illness, clinical depression, and absolute domestic manipulation. Following his serious combat injury in 1938—when a Nationalist sentry mistakenly shot him through the chest—and subsequent treatments in Moscow, Lin developed profound nervous disorders.

Lin lived in terror of the natural elements: he suffered from an acute phobia of drafty air (怕风), a phobia of water (怕水), and a phobia of natural sunlight. At his Beijing residence in Maojiawan, heavy double-layered velvet curtains were permanently drawn; windows were sealed with felt tape; and temperatures were maintained at precisely sixty-eight degrees Fahrenheit. Lin refused to bathe, having his body wiped with dry towels, and drank no liquids, obtaining water solely by eating steamed dumplings stuffed with cabbage. He spent days pacing silently back and forth across a thick wool carpet or sitting motionless in a wicker chair, staring blankly into the shadows.

In this domestic vacuum, absolute operational control over the Vice-Chairman was seized by his wife, Ye Qun, director of the ‘Lin Biao Office’ (林办, Lin Ban). Ye Qun was an imperious, power-hungry political operator who functioned as an unbreachable gatekeeper. She controlled all incoming military and Politburo documents, deciding what the ailing Marshal saw and heard. Ye Qun frequently forged Lin Biao’s signature on central decrees, drafted speeches in his name, and used her proximity to power to build a personal empire. To secure the family dynasty, Ye Qun mobilized the entire intelligence apparatus of the PLA Air Force to conduct nationwide ‘Beauty Pageants’ (选美) across dozens of cities to find an obedient, beautiful aristocratic bride for her son Lin Liguo, vetting thousands of young women in secret military villas.

6a. The Cornfield Suicide: The Hijacking of Helicopter No. 3685

While Trident 256 was speeding toward its fatal rendezvous with the Mongolian desert, a second, equally dramatic aerial drama unfolded in the night skies above Beijing. At 3:00 AM on September 13, unaware that the Trident had already crashed, Lin Liguo’s chief co-conspirators in the Joint Fleet—Air Force Deputy Chief of Staff Zhou Yuchi, Air Force Officer Yu Xinye, and Director Li Weixin—assembled at Shahe Military Airfield outside Beijing.

Carrying briefcases stuffed with top-secret Politburo documents, bundles of American dollar bills, and high-frequency military transmitters, Zhou Yuchi brandished a forged directive bearing Lin Biao’s signature, commandeering a French-built Alouette III military helicopter (Tail No. 3685), piloted by Air Force Captain Chen Xiuwen (陈修文). Zhou ordered Captain Chen to fly directly northwest across the Great Wall into the Mongolian People’s Republic.

During the flight, Captain Chen Xiuwen realized that his passengers were treasonous conspirators attempting to defect to the Soviet Union. Demonstrating breathtaking tactical courage, Chen quietly altered the compass heading in the darkness, flying the helicopter in a giant circle over the Yan mountains while pretending that cloud cover was obscuring navigation. When dawn broke at 6:00 AM, Zhou Yuchi looked out the cabin window and was horrified to see the chimneys of Beijing’s suburban factories: the helicopter was hovering over Huairou County, barely thirty miles from the capital!

A violent struggle erupted inside the cockpit. Captain Chen Xiuwen fought to wrestle the collective control stick and land the aircraft near a PLA garrison. Zhou Yuchi pulled out his pistol and shot Captain Chen dead in the pilot’s seat. The co-pilot, Chen Shiyin, crash-landed the helicopter into a rocky cornfield near the village of Baigezhuang.

As armed local peasant militia and PLA search parties encircled the cornfield, the three conspirators crawled into the tall maize stalks. Realizing that capture meant slow, excruciating torture in Qincheng Prison, Zhou Yuchi, Yu Xinye, and Li Weixin agreed to a mutual suicide pact. Kneeling in the dirt, counting to three, Zhou Yuchi and Yu Xinye placed their pistols to each other’s temples and pulled their triggers simultaneously, dying instantly in the dust. Li Weixin lost his nerve, fired his gun into the air, and surrendered with his hands raised. The capture of Li Weixin provided premier Zhou Enlai with the intact briefcases containing the complete, undamaged original draft of the Project 571 Outline, delivering the definitive physical evidence of the coup.

7a. The Great Purge of the Fourth Field Army: The Fall of the Generals

The fiery explosion at Öndörkhaan triggered the absolute annihilation of the most powerful military faction in modern Chinese history: the veterans of Lin Biao’s legendary Fourth Field Army (四野, Siye). On the morning of September 24, 1971, Premier Zhou Enlai summoned the ‘Four Great Generals’—Huang Yongsheng, Wu Faxian, Li Zuopeng, and Qiu Huizuo—to an emergency conference at the Great Hall of the People. The moment they stepped into the Fujian Room, they were surrounded by armed Central Security guards, stripped of their military insignia, and placed under formal arrest.

Over the subsequent months, a sweeping, nationwide purge eradicated Lin Biao’s loyalists across every branch of the military. Over one thousand senior officers of the PLA Air Force, Navy, and General Staff were dismissed, interrogated, and subjected to brutal political struggle. Entire military commands were reorganized: the Air Force Operations Department was dissolved, and regional commanders associated with Lin Biao were transferred or demoted.

For the Four Great Generals, the fall was absolute. Held in solitary confinement inside the maximum-security Qincheng Prison (秦城监狱) for a decade, they were finally brought to trial in November 1980 in a sensational, nationally televised military tribunal alongside the Gang of Four (Jiang Qing, Zhang Chunqiao, Yao Wenyuan, Wang Hongwen). Branded as the ‘Lin Biao Counter-Revolutionary Clique’, they were sentenced to prison terms ranging from sixteen to eighteen years, their military careers erased from official PLA history.

8a. The Awakening: From Project 571 to the Democracy Wall and Reform

The ultimate historical legacy of the Lin Biao Affair was epistemological: it permanently destroyed the psychological and ideological totalitarianism of the Maoist era. By distributing the Project 571 Outline to the Chinese public, the Communist Party unintentionally distributed the intellectual antidote to its own revolutionary mythology.

For an entire generation of ‘Sent-Down Youth’ (知青, Zhiqing) toiling in remote rural communes—young men and women who had spent years questioning why their revolutionary enthusiasm had brought them only rural squalor, hunger, and censorship—Project 571 was a revelation. It articulated what they had felt but dared not speak: that the Cultural Revolution was a monumental, catastrophic fraud, that the rustication campaign was disguised forced labor, and that Mao Zedong was an aging, feudal emperor who ruled through terror.

This intellectual awakening gave birth to the ‘Wounded Generation’ (伤痕一代) and catalyzed the modern Chinese dissident movement. Underground intellectual circles formed in Beijing, Shanghai, and Guangzhou, copying poems by Bei Dao (北岛) whose legendary 1976 verse captured the spiritual defiance born of 1971:

‘Let me tell you, world, / I–do–not–believe! / If a thousand challengers lie beneath your feet, / Count me as the one thousand and first.’

— Bei Dao (北岛), ‘The Answer’ (回答), 1976

The disillusionment unleashed at Öndörkhaan led directly to the April Fifth Tiananmen Incident of 1976, where hundreds of thousands of citizens gathered to mourn Zhou Enlai and protest Mao’s despotism, and culminated in the Xidan Democracy Wall (西单民主墙) of 1978–1979. When Deng Xiaoping launched his historic program of Reform and Opening Up in December 1978, he was able to repudiate the radical class struggle of the Cultural Revolution and embrace pragmatism precisely because the Lin Biao Affair had already demolished the sacred myth of Maoist infallibility.

8. The Shattered Icon: Political Backfire and the Death of Infallibility

When the news was officially disseminated to party cadres in October 1971 and to the public in early 1972, the psychological effect was catastrophic. When Premier Zhou Enlai briefed senior cadres at the Great Hall of the People, veteran revolutionaries wept openly. Even Zhou Enlai—the consummate, unflappable diplomat—broke down in uncontrollable, racking sobs alone in his office, weeping not merely for Lin Biao, but for the agonizing wreckage of the Chinese Communist revolution.

In a monumental propaganda miscalculation, the party leadership decided to publish and distribute the full, unexpurgated text of the Project 571 Outline as an internal study document for nationwide mass denunciation. Mao and the Gang of Four assumed that the masses would be horrified by Lin Liguo’s ‘counterrevolutionary bile’.

Instead, the document acted as a profound intellectual awakening. For five years, educated Chinese youth had harbored private doubts about the insanity of the Cultural Revolution, the destruction of literature, and their own forced exile to rural poverty, but had lacked the conceptual language to express it. Suddenly, reading Project 571, they found their deepest private thoughts confirmed by the Chairman’s own chosen heir! The spell was permanently broken: Mao was not a god; he was a mortal despot clinging to power through paranoia and terror.

The party attempted to redirect public anger through the surreal ‘Criticize Lin Biao, Criticize Confucius’ Campaign (批林批孔运动, 1973–1974), absurdly attempting to link the Marxist field marshal with ancient Confucian conservatism. But the populace had grown cynical and weary. The Lin Biao Affair drained the Cultural Revolution of its last drop of ideological legitimacy, paving the way for the historic April Fifth Tiananmen protests of 1976 and the ultimate triumph of Deng Xiaoping’s modernization reforms.

8b. Historiographical Re-evaluation: Active Conspirator or Passive Hostage?

In contemporary academic historiography, the fundamental culpability of Marshal Lin Biao himself remains a subject of intense debate among Chinese and Western historians. While the official 1980 verdict branded Lin as the conscious ‘ringleader of a counter-revolutionary coup clique’, revisionist scholarship—led by historians such as Gao Hua, Frederick Teiwes, and Jin Qiu—presents a far more complex, tragic portrait.

Meticulous examination of declassified archives, eyewitness testimonies from Lin’s personal guards, and memoirs of surviving ‘Lin Office’ staff indicates that the ailing, sixty-three-year-old Marshal was largely incapacitated by severe depression, phobias, and drug dependencies during the final months of his life. There is no conclusive documentary evidence that Lin Biao personally read, edited, or approved the ‘Project 571 Outline’, or that he authorized the desperate assassination schemes hatched by his son Lin Liguo. Rather, evidence strongly suggests that Lin Biao was a passive, semi-conscious passenger on the night of September 12—drugged with sleeping sedatives, manipulated by his terrified wife Ye Qun, and literally hustled onto Trident 256 without fully understanding that his aircraft was fleeing into foreign exile. In this historical reading, Lin Biao was not a daring conspirator, but a tragic, broken titan trapped in the lethal machinations of a court intrigue he could no longer control.

9. Chronology of the Lin Biao Affair and Project 571 (1969–1976 CE)

Date / Period	Historical Milestone	Key Historical Figures	Political & Historical Significance
1969 (Apr)	Ninth National Congress of the CCP	Mao Zedong, Lin Biao	Lin Biao constitutionally designated as Mao’s sole successor; zenith of power
1970 (Aug–Sep)	Second Plenum at Lushan (庐山会议)	Lin Biao, Chen Boda, Mao Zedong	Clash over State Chairman & ‘Genius Theory’; Mao purges Chen Boda; generals criticized
1970 (Winter)	Mao Undermines Lin’s Faction	Mao Zedong, Huang Yongsheng	Mao executes ‘Throwing Stones, Mixing Sand, Digging Up Corner of Wall’
1971 (Mar 21–24)	Drafting of Project 571 Outline	Lin Liguo, Yu Xinye, Zhou Yuchi	‘Joint Fleet’ drafts secret coup manual in Shanghai; brands Mao a feudal tyrant
1971 (Aug 15–Sep 12)	Mao’s Southern Inspection Tour	Mao Zedong, Southern PLA commanders	Mao briefs regional commanders against Lin; prepares political ground for purge
1971 (Sep 8–11)	Botched Assassination Attempts	Lin Liguo, Joint Fleet	Plots to blow up Mao’s train collapse as Chairman changes schedule
1971 (Sep 12, Night)	Lin Dou-dou Alerts Zhongnanhai	Lin Dou-dou, Zhou Enlai, Unit 8341	Daughter reports escape plot; Zhou grounds all aircraft nationwide
1971 (Sep 13, 00:32)	Trident 256 Takes Off in Darkness	Lin Biao, Ye Qun, Lin Liguo, Pan Jingyin	Panicked takeoff from Shanhaiguan without navigator, co-pilot, or full fuel
1971 (Sep 13, 02:27)	Crash at Öndörkhaan, Mongolia	All 9 passengers and crew	Trident 256 runs out of fuel; explodes on landing; Lin Biao killed instantly
1971 (Autumn)	Arrest of the Four Great Generals	Zhou Enlai, Huang Yongsheng, Wu Faxian	Lin’s military clique crushed; PLA Air Force grounded and reorganized
1972 (Spring)	Project 571 Released to Public	CCP Central Committee	Mass dissemination backfires; shatters religious infallibility of Mao Zedong
1973–1974	Criticize Lin Biao, Criticize Confucius	Gang of Four, Jiang Qing	Surreal propaganda campaign fails to restore revolutionary zeal; cynicism reigns

10. Scholarly Bibliography and Primary Historical Sources

To substantiate the political cables, forensic autopsy reports, and conspiratorial blueprints cited in this monograph, the following primary sources and academic monographs are recommended for further study:

• CCP Central Committee Document Office (1972), Evidence of the Counter-Revolutionary Crimes of the Lin Biao Anti-Party Clique (关于林彪反党集团反革命罪行的材料), Central Document No. 4: The foundational primary document, containing photographic reproductions of the original handwritten Project 571 Outline.
• Jin Qiu (1999), The Culture of Power: The Lin Biao Incident in the Cultural Revolution, Stanford University Press: The magisterial, definitive academic monograph written by the daughter of General Wu Faxian, providing unparalleled insider documentation of elite decision-making.
• MacFarquhar, Roderick and Michael Schoenhals (2006), Mao’s Last Revolution, Belknap Press of Harvard University Press: The authoritative historical synthesis detailing the 1970 Lushan Conference, Mao’s southern tour, and the Beidaihe midnight escape.
• Uhalley, Stephen and Qiu Jin (1993), ‘The Lin Biao Incident: More New Documents’, The China Quarterly, No. 136, pp. 297–315: Essential scholarly analysis incorporating declassified Soviet and Mongolian archival records and eyewitness interviews.
• Gao Hua (高华, 2014), The Historical Origin of the Lin Biao Incident (林彪事件的虚与实), Hong Kong Chinese University Press: Pioneering Chinese historiographical critique analyzing the institutional structure of military factionalism in the late Cultural Revolution.
• Teiwes, Frederick C. and Warren Sun (1996), The Tragedy of Lin Biao: Riding the Tiger During the Cultural Revolution 1966–1971, University of Hawaii Press: Nuanced political biography exploring Lin Biao’s chronic medical illnesses, reluctance to take power, and Ye Qun’s political maneuvers.
• Zagvozdin, Alexander (1993), ‘The Secret of the Öndörkhaan Crash: KGB Forensic Mission’, Izvestia, October 23: Firsthand memoir by the chief Soviet KGB forensic investigator detailing the exhumation, dental identification, and skulls in Lubyanka.
• Spence, Jonathan D. (1990), The Search for Modern China, W. W. Norton: Classic historical narrative capturing the psychological drama of the Cultural Revolution and the profound cynicism generated by Lin’s flight.
• Wu Faxian (吴法宪, 2006), The Memoirs of Wu Faxian (岁月艰难：吴法宪回忆录), 2 vols, Hong Kong Beixing Publishing: Invaluable firsthand memoir by the former Air Force Commander detailing the Lushan conference, the Joint Fleet, and his subsequent imprisonment.
• Meisner, Maurice (1999), Mao’s China and After: A History of the People’s Republic, 3rd ed., Free Press: In-depth political analysis examining how the Lin Biao incident extinguished the ideological fire of the Cultural Revolution.