He valued his principles above all. During the Cultural Revolution, when Mao Tse-tung had already been deified, he had the conscience to say, "To secure personal power at such cost to the country and the people has to be wrong. In fact, I think it is criminal," and he dared to write a letter to Mao.
他重原則高於一切，在毛澤東已經神化了的文革時代，他本著良心說：「毛澤東為了個人精力，讓國家和人民遭受這麼大的災難，肯定是錯的，簡直就是犯罪」，而且敢寫信給毛澤東。