1949年,当中国共产党夺取全国政权已成定势之际,为和平解放北平做出过贡献的傅作义提出一个尖锐的问题:国民党夺取政权后20年就腐化了,结果被人民打倒了。共产党执政后30年或40年以后是不是也会腐化?对此,毛泽东意味深长地把进驻北平称作进京“赶考”,并说:“我们决不当李自成, In 1949, when the Chinese Communist Party seized power of the whole country, it was a matter of certainty. Fu Zuoyi, who made a contribution to the peaceful liberation of Peking, raised a sharp question: the Kuomintang has been corrupted for 20 years after it seized power, and the people have overthrown it. In the meantime, Mao Zedong deliberately called Peking into Beijing as a “test” and said: "We should never be considered as Li Zicheng,