The 20th Century Mainstream Open-minded Historical Evolution

China has suffered a change from passive open to initiative in 20th cen-tury. From the beginning to the end of this century, Chinese modern timesopen thoughts of thinkers have suffered a change from putting forward, de-veloping, to maturing. In the paper, the author firstly makes a distinctionbetween passive open and initiative open.Then, the second part discusses Sun Zhongshan's open thought. Hefirstly put forward the open thought from passive to initiative. His openthought forms a system whose main point is how to make passive open toinitiative open. But his thought can' t be realized because of his class andtimes defects.In the third part,it discusses Mao Zedong's open thought. He is thepracticer of thought from passive to initiative, because Mao Zedong hassolved the problem which Sun Zhongshan left. He developed a who1e socia1-ism open thought system. But he cann' t deal with the re1ation between so-cialism and capitalism.The forth part, the key of the paper. Deng Xiaoping solves the problemthat Mao Zedong left. He points out that socialism and capitalism have thesame part and can be mutually complemented under the condition that peaceand deve1epment is the main times subject. His point puts the basis of hisopen thought. Deng Xiaoping's open thought has matured by the end of20th century,moreover, Deng Xiaoping's open thought more and more em-bodys leading function.The last part analyses the characters of the historica1 deve1opment ofChinese open thoughts in 20th century and summarys sevral inspiarationswhich give our social reform and open to think.