Introduction to the Four Masters of the Wu Family: Wu Zhengzhu, also known as Wu Baitao, was the deputy director of the Jiangsu Provincial Department of Culture, a professor at Nanjing University, and a famous dramatist; Wu Zhengjian, the former vice president of the Chinese Academy of Medical Sciences and a famous medical biologist ; Wu Zhengkai, an academician of the Chinese Academy of Sciences and a famous nuclear physicist; Wu Zhengyi, an academician of the Chinese Academy of Sciences and a famous plant taxonomist.