July 6th. Wei Dongyi1991July 6 was born in Jinan, Shandong, Dongyang, Zhejiang. Peking University, Assistant Professor, Research Fellow, Department of Differential Equations, Peking University Institute of Mathematical Sciences. Wei Dongyi has won the following awards: full marks in the 49th International Mathematical Olympiad, first place in the gold medal; The 50th International Mathematical Olympiad got full marks and won the first place in the gold medal; Alibaba Dharma Academy Green Orange Award, etc.