Sima Lu (1919-2021) was an expert on the history of the Chinese Communist Party. He joined the Chinese Communist Party in 1937, then was politically persecuted in Yan'an, left it, and was expelled from the Party in 1941. In 1952, Sima Lu published “Eighteen Years of Struggle” in Hong Kong, writing about his tortuous journey from defecting to the Communist Party to his awakening and eventual choice of freedom. It became a sensation. He has made in-depth special studies on several leading figures of the CCP, such as Qu Qubai and Zhang Guotao. His memoir, “Witness to the History of the CCP”, is divided into three chapters according to its contents: the first is about his personal experience, the second about the first generation of CCP figures, and the third is devoted to the struggle between Mao Zedong and Zhou Enlai.