There are more than 300 full-time graduate students at the Department of Hydraulic Engineering, as well as five doctoral classes and two graduate classes. For a long time, graduate students of our department have carried out rich activities to live a wonderful life, resulting in a broad influence at Tsinghua University. For example, they won the championship for three consecutive years in ‘December Nine’ Revolutionary Singing Contest, and ‘Hydraulic Architecture’ Graduate Students Festival and so on. Class 11 won Advanced Collective of Tsinghua University, ‘Pioneer Cup’ Outstanding Grass-root Youth League Branch of Beijing and other honors while Graduate Student Youth League won the title of ‘Outstanding Graduate Student Youth League of Tsinghua University’ for several times.