Qian Mu recalled that when he was teaching in yenching university, he was very dissatisfied with the buildings of Yanda University named after "M" and "S". He thinks that such a name has no Chinese flavor at all and should be changed to China's name. At that time, a school affairs meeting was specially held for this purpose, so the "M" building was changed to "Mu" building and the "S" building was changed to "Shun" building. All the other buildings are named China.

There is also a lake in Yanyuan, with beautiful scenery, but it has no name yet. At that time, we decided to have a name together. But I have tried many names, but I always feel inappropriate. Finally, simply call it "Unnamed Lake". This is the origin of the unnamed lake in Peking University today. No one expected that this was actually a small suggestion from Qian Mu.

This is a positive solution. .