秦城监狱
During the Cultural Revolution, on charges of plotting against Zhou Enlai, he was imprisoned in 1968 in the north of Beijing in Qincheng Prison, where he was subjected to solitary confinement. In 1973, he was released, and Zhou apologized. His privileges were restored. Despite his 5 years imprisonment, he remained loyal to the ideals of Communism until his death. Israel Epstein was elected as a member of the Standing Committee of the National Committee of the Chinese People's Political Consultative Conference, an advisory body, in 1983.