Yang Zhenning donated hundreds of dollars to Tsinghua. The former president of Tsinghua Institute of Physics once said that "without Yang Zhenning, there would be no modern physics department in Tsinghua", which introduced a large number of overseas talents (including Yao Qizhi) to China and made great contributions to China. Of course, Li Zhengdao has made great contributions to China, and both of them deserve respect.