Chen Duxiu
After the communist movement in the late 1920s, Chen Duxiu and Leon Trotsky started to have a complex relationship that was not known in the west. Their relationship reveals the developments of Trotskyism in China and deepen the understanding of the relationship between the Communists of China and Soviet Union. Due to lack of related resources, the public did not have a full understanding of the relationship between Chen Duxiu and Leon Trotsky. Nowadays, this situation has already improved a lot by following reasons. Firstly, more printed Chinese materials about Chen Duxiu are available. Secondly, in 1980, the "Exile papers of Leon Trotsky" which includes letters, personal notes, manuscripts, and many unpublished resource were accessible.