During the
Second Sino-Japanese War, Tan served as director of the Political Department in the
Eighth Route Army, and deputy director of the General Political Department. During the
Chinese Civil War, Tan was the director of the Political Department in the
Northeast Democratic Coalition. After the founding of the People's Republic of China, Tan Zheng served as the first deputy director of the
PLA General Political Department. He was promoted to general in 1955 and was granted the People's Liberation Army Red Star of Merit Medal in 1988. Tan Zheng wrote “On the political work of the revolutionary army” and “On the enemy purpose and policy” during the Second Sino-Japanese War. He drafted the "Report on the army's political work" in 1944 by the
CCP Central Committee. After modifications of Mao Zedong,
Zhou Enlai, and the approval of the Central Committee, the work was promulgated in the Northwest Board meeting of senior cadres. The report is a comprehensive summary of the political work experience of the Red Army, the Eighth Route and
New Fourth Army. It summaries the change of the situation and tasks of the Second Sino-Japanese War, also discusses the status, basic principles and the basic principles of the people's army's political work. ==Later career==