February 11 and February 16
In the CPC Central Committee’s briefing meeting presided over by Zhou Enlai in Huairen Hall of Zhongnanhai and the briefing meeting of the CPC Central Military Commission held on January 19 and 20, Tan Zhenlin, Chen Yi, Ye Jianying, Li Fuchun, Li Xiannian, Xu Xiangqian, Nie Rongzhen and others sharply criticized many of the wrong actions taken in the “Cultural Revolution.” The resistance, later denounced as the “February adverse current,” was silenced and attacked.
March 19
The CPC Central Military Commission issued the Decision on the PLA’s Resolute Support of the Revolutionary People of the Left, Agriculture, Industry, Military Control and Military Training (known as “three supports and two militaries”). By August 1972, the PLA had dispatched more than 2.8 million officers and soldiers to carry out the task of “three supports and two militaries.”
June 17
China successfully detonated its first hydrogen bomb.
September 5
The governments of China, Tanzania and Zambia signed an agreement on building the TAZARA Railway in Beijing. The Railway was completed on July 14, 1976, and the handover ceremony was held in Zambia.
From: Chronicle of the People's Republic of China (October 1949 — September 2019) ,edited by The Institute of Party History and Literature of the Central Committee of the Communist Party of China, PP68-69