Today, 54 years ago, on March 22, 1971 (February 26, 1971), Lin Biao instructed Lin Lichang and others to formulate the "571 Project Document".On March 22, 1971, Lin Biao and the group instructed Lin Lichang and Zhou Yuzhou and others in Shanghai to formulate a counter-revolutionary armed coup plan, named "571 Project Document".They attempted to "military preventing people", stressed that "whether prepared or unprepared, also to break the Boom Boom", conspired to use "the network of the upper assembly to finish" or use bombing, car crashes, assassinations, kidnapping, urban guerrilla and other "special means" to launch a revolutionary coup, kill President Mao Zedong, "take the power of the nation" or