Mr. Mao Zishui introduced: Mao Zishui (1893-1988), named Yanzuo, also known as Zishui, also known as Falcon. Qingyang Mao's 56th generation grandson. Mr. Mao Zishui is a famous master of Chinese studies in modern my country. He once served as a professor at Peking University, Southwest Associated University, National Taiwan University and director of the Peking University Library. He was deeply appreciated by Cai Yuanpei, the former president of Peking University, and his mentor Hu Shi.