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Ding Shisun (Chinese: 丁石孙; September 5, 1927 – October 12, 2019) was a Chinese mathematician, academic administrator, and politician. He was President of Peking University during the 1989 Tiananmen Square protests. He was forced to resign afterwards. He later was Chairman of the China Democratic League from 1996 to 2005 and Vice Chairperson of the National People's Congress. He was born in Shanghai. He attended Utopia University in Shanghai from 1944 to 1947.