1930, scholar Qian Mu went to yenching university to teach. President Si Tuleideng asked him what his impression of yenching university was. Qian Mu replied, "At first, I heard that Yanda University is the most China-oriented university among the Christian universities in China, and I especially yearned for it. When I came to Yanda, I found that this was not the case. As soon as you enter the school gate, you will see the M building and the S building. Is this China? I hope to change all the buildings in Yanda to the name of China. " Soon Yanda adopted the suggestion, and Qian Mu later named a lake on the campus of Yanda University as "Unnamed Lake", which is the famous "Unnamed Lake" of Peking University today.