Project 571

Project 571 was the numeric codename given to an alleged plot to execute a coup d'etat against Chinese leader Mao Zedong in 1971 by the supporters of Lin Biao, then Vice-Chairman of the Communist Party of China. In Chinese, the numbers "5-7-1" sound like the term "armed uprising". The Chinese government initially claimed that Lin Biao himself had devised Project 571, but evidence inside and outside of China has made it more likely that Lin's son, Lin Liguo, a high-ranking officer in the People's Liberation Air Force, instead developed the plot. Any plots that may have been planned or attempted by Lin Biao or his family ultimately failed. Lin's family attempted to flee China for the Soviet Union, but died when their plane crashed over Mongolia on September 13, 1971. A drafted copy of the Project 571 Outline was discovered following Lin's death, and was publicly circulated by the Chinese government as a means of explaining the event.

Details of the plot
The Project 571 Outline was not written in the form of a practicable military plan, but more as political declaration. Of the nine sections of the Outline, only two deal directly with military strategy; the remaining sections either criticize the politics of the Cultural Revolution or attack the personality of China's leader, Mao Zedong. Because the writers of the Outline apparently lacked both the military knowledge and the ability to mobilize large groups of forces, Western scholars generally refute the possibility that Lin Biao could have personally planned Project 571.

Of the sections which deal with military strategy, the Outline's authors mention the support of a number of disparate forces, none of which were overwhelmingly powerful. The plotters believed they were supported by the equivalent of approximately six to eight Air Force divisions: the Fourth and Fifth Air Force Corps; the Ninth, Eighteenth, and Thirty-Fourth Air Force Divisions; the Thirty-Fourth Tank Regiment; and, (perhaps unusually) the Bureau of Civilian Aviation. The authors also noted that they expected the support of an "auxiliary force" composed of the Twentieth and Thirty-Eighth Armies (Lin Biao's own elite units) and several provinces, which were only vaguely mentioned. The combination of these forces was not great, compared to the rest of the People's Liberation Army, and the authors of the Outline noted that "at present the preparation of our strength is still not adequate".

The military plans contained in the Outline were below the standards that could have been expected from Lin Biao, one of modern China's most successful generals. Because Lin Biao was a master of maneuvering ground forces, it is unusual that he would have relied almost exclusively on the Air Force, even though his own elite forces were readily available to him. In the Chinese Civil War, Lin had become a master of delaying decisive confrontations until he knew the chances of victory had become overwhelming, and scholars note that it would have been out of character for Lin to have staked his political career on such a poorly-planned military coup, whose chances of success were slim. There is no direct evidence that suggests that either Lin or his generals were involved in the coup plot, but many scholars believe that his son, Lin Liguo, a high-ranking officer in the People's Liberation Air Force, was instead the author. Within China, the theory that Lin Liguo drafted the Project 571 Outline was corroborated by the testimony of Lin Biao's generals in the special trials of the "Lin Biao and Jiang Qing Counter-Revolutionary Cliques", which were held in 1980.

History of the plot
Following Lin's death in 1971, the Chinese government initially charged Lin Biao with personally planning Project 571. After the testimony of Li Weixin (the only one of the alleged plotters to have survived 1971), and the 1980 testimony of General Huang Yongsheng (a former military chief-of-staff whose role in the plot was implied by the testimony of Li Weixin), sources within China have generally come to recognize that Lin Liguo devised the plot independent of Lin Biao. Western scholars have been critical of the Chinese government's perspective since 1971, and generally state that Lin Liguo was the author of the plot. Some Western historians question whether Lin Biao was even aware of Lin Liguo's plans at all.

According to a modern standard Chinese narrative of Lin Biao's plot, Lin Biao became aware that Mao no longer trusted him after the Second Plenum of the 9th National Congress of the Communist Party of China in 1970, and he harbored a strong desire to seize supreme power. In February 1971 Lin and his wife, Ye Qun (who was then a Politburo member), began to plot Mao's assassination. In March 1971, Lin Liguo held a secret meeting with his closest followers at an Air Force base in Shanghai. At this meeting, Lin Liguo and his subordinates supposedly drafted Project 571. Later that March, the group met again to formalize the structure of command following the proposed coup. The other major plotters were high-ranking military officers, including Zhou Yuchi, Yu Xinye, and Li Weixin.

From March 23 to 24, Yu Xinye drafted the Project 571 Outline, the original manuscript of which was said to have been recovered after the death of the coup plotters. In the Outline, Lin Liguo's party listed a total of eight ways to eliminate Mao Zedong. Among them were detonating his train, collapsing a railway bridge as his train was crossing, using napalm, and simply using a handgun to assassinate him.

Mao was unaware of the coup plot; and, in August 1971, scheduled a conference for September to determine the political fate of Lin Biao. On August 15 Mao left Beijing to discuss the issue with other senior political and military leaders in southern China. On September 5, Lin received reports that Mao was preparing to purge him. On September 8, Lin Biao decided to speed up the coup and gave the order to his subordinates to proceed with Mao's assassination, under the direction of Lin Liguo and Zhang Yuchi (who was then the deputy director of the Office of the Air Force Headquarters).

Lin's subordinates planned to assassinate Mao by sabotaging his train before he returned to Beijing, but Mao unexpectedly changed his route on September 11. Mao's bodyguards foiled several subsequent attempts on Mao's life, and Mao safely returned to Beijing in the evening of September 12. By failing to assassinate Mao, the coup attempt associated with Project 571 failed.

After realizing that their coup attempt had failed, Lin's party first considered fleeing south to their base of power in Guangzhou, where they would establish an alternate base of power and attack armed forces loyal to Mao in cooperation with the Soviet Union. After hearing that prime minister Zhou Enlai was investigating the incident, they abandoned this plan as impractical, and decided to flee to the Soviet Union instead. In the early morning of September 13, Lin Biao, Ye Qun, Lin Liguo, and most of the other major plotters attempted to flee to the Soviet Union and boarded a prearranged Trident 1-E, (a CAAC B-256) piloted by Pan Jingyin, the deputy commander of the PLAAF 34th division. The plane did not take aboard enough fuel before taking off, ran out of fuel, and crashed near Öndörkhaan in Mongolia on September 13, 1971. Everyone on board, eight men and one woman, was killed.

After September 12, a massive purge of the armed forces took place. All military officials identified as being close to Lin or his family (most of China's high military command) were purged within weeks of Lin's disappearance. Within a month of Lin's disappearance, over 1,000 senior Chinese military officials were purged. After he was confident that all of the alleged plotters were either dead or arrested, Mao Zedong had copies of the Project 571 Outline widely circulated among cadres in the Communist Party. The official Chinese version of events was drafted by Zhang Chunqiao and his subordinates under Mao's personal supervision. By publicly revealing the details of the plot, Mao tacitly contradicted the earlier myth that he was universally supported within the Communist Party.

Codes used in the outline

 * "B-52" referred to Mao Zedong.
 * "Enemy Capital Ship" referred to Mao's supporters.
 * "Trotskist Writers" referred to Zhang Chunqiao and Yao Wenyuan
 * "Wang, Chen and Jiang" were Wang Weiguo, Chen Liyun and Jiang Tengjiao, some of Lin Biao's supporters.
 * "Project 01" references a dispatch telegraph whose design was masterminded by Lin Liguo.
 * Eda Island, site of the Japanese naval academy where Kamikaze pilots were indoctrinated in the spiritual training of Bushido.
 * "Death before dishonor", a slogan that Chiang Kai-Shek used to train his cadres.