a coup. Lin's son, Lin Liguo, and other high-ranking military conspirators formed a coup apparatus in Shanghai and dubbed the plan to oust Mao by force Outline for Project 571, which sounds similar to "Military Uprising" in Mandarin. It is disputed whether Lin Biao was involved in this process. While official sources maintain that Lin planned and executed the alleged coup attempt, scholars such as Jin Qiu portray Lin as a passive character manipulated by members of his family and his supporters. Qiu contests that Lin Biao was never personally involved in drafting the Outline and evidence suggests that Lin Liguo drafted the coup. The Outline allegedly consisted mainly of plans for aerial bombardments through use of the Air Force. It initially targeted Zhang Chunqiao and Yao Wenyuan, but would later involve Mao himself. If the plan succeeded, Lin would arrest his political rivals and assume power. Assassination attempts were alleged to have been made against Mao in Shanghai, from September 8 to 10, 1971. Perceived risks to Mao's safety were allegedly relayed to the Chairman. One internal report alleged that Lin had planned to bomb a bridge that Mao was to cross to reach Beijing; Mao reportedly avoided this bridge after receiving intelligence reports. Death of Lin Biao In the official narrative, on September 13, 1971, Lin Biao, his wife Ye Qun, Lin Liguo, and members of his staff attempted to flee to the Soviet Union ostensibly to seek asylum. En route, Lin's plane crashed in Mongolia, killing all on board. The plane apparently ran out of fuel en route to the Soviet Union. A Soviet team investigating the incident was not able to determine the cause of the crash but hypothesized that the pilot was flying low to evade radar and misjudged the plane's altitude. The official account has been put to question by foreign scholars, who have raised doubts over Lin's choice of the Soviet Union as a destination, the plane's route, the identity of the passengers, and whether or not a coup was actually taking place. On September 13, the Politburo met in an emergency session to discuss Lin Biao. Only on September 30 was Lin's death confirmed in Beijing, which led to the cancellation of the National Day celebration events the following day. The Central Committee kept information under wraps, and news of Lin's death was not released to the public until two months following