Tao Zhu
Chen was persecuted during the Cultural Revolution due to his previous connection with the out-of-favor Tao Zhu. He and his wife's salaries were frozen by the Red Guards. Several times he was forced to write statements to clarify his political standings: "I have never done anything harmful to Chinese people in my life. I have been a teacher for 40 years, only doing teaching and writing, but nothing practical (for Kuomintang)". Many of his book collections and manuscripts were stolen.