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Chair Professor of Tsinghua University, Director of the Yau Mathematical Sciences Center, Dean of Qiuzhen College, President of Beijing Institute of Mathematical Sciences and Applications (BIMSA), Foreign Academician of the Chinese Academy of Sciences, Member of the National Academy of Sciences of the United States of America, Member of the American Academy of Arts and Sciences, Winner of the Fields Medal, Oswald Veblen Prize in Geometry, MacArthur Fellows Program, Crafoord Prize, National Medal of Science of the United States of America, Wolf Prize in Mathematics, Marcel Grossmann Awards, and Shaw Prize.