Complex sentence: In 1987 he graduated from the Department of Mathematics of Peking University and in 1992 he completed a master's degree of Computational Mathematics in the University of Chinese Academy of Sciences (UCAS).
Split into simpler sentences: In 1987 he graduated from the Department of Mathematics of Peking University. In 1992 he completed his master's degree in Computational Mathematics from the University of Chinese Academy of Sciences (UCAS).