1966年5月16日,中共中央政治局擴大會議通過《中國共產黨中央委員會通知》,指稱黨內有資產階級,要求全黨高舉無產階級文化革命的大旗,批判學術權威。 On May 16, 1966, an enlarged session of the CCP Central Political Bureau passed the 'May 16 Notification,' asserting that bourgeois elements had infiltrated the Party and calling on all members to raise the banner of the proletarian cultural revolution and criticize academic authorities.