March 22, 1971 (, Xinhai February 26), Lin Biao instigated the Liguo develop 571 engineering Minutes. In 22,

1971 Lin Biao, Ye Qun instigation Liguo, Zhou Yuchi people in Shanghai has developed a counterrevolutionary armed coup plan, known as the "571 Project Minutes. They try in vain in the "pre-emptive" military, stressed that "regardless ready or not ready, but also the most drastic" small conspiracy using "the upper assembly clean sweep" or the use of bombing, a car accident, assassination, kidnapping, urban guerrilla the detachments "special means" to launch a counter-revolutionary coup d'etat, [l $ j��.c��] the killing of Chairman Mao Zedong, seize national regime "or manufacturing" Separatist "establish Lim world. According to this counter-revolutionary "provisions and requirements of the" 571 Project "Minutes", (l $ dj��.��r��) Lin Biao counterrevolutionary Group immediately into action, eager to have stepped up the pace to launch a counter-revolutionary armed coup.