| Sino-American relation occupies decisive position to the international relation in the nowadays,the development of it is relatedto the Asian-Pacific region and the world peace general situation and linking up with both countries interests of the people closely. Therefore,Sino-American relation always is the priority that academic circles ; One of the direction studying among them is the research about that Sino-American relation unfreezes. Academic circles studies the books , article that Sino-American relation unfreezes are quite much at present, the most is to put particular emphasis on the channel from being hostility to improving process and their historical setting significance, affecting aspects, but research about three significant channels: Romanian channel , Pakistan channel and Paris channel is less, especially the research about Paris channel is still blank space in recent ten years. The main body of a book is tried with looking like independent three channels putting in investigation and discussion, carrying out comparison together , and triple analysing the channel,why to choose last two channels but to give up the Romania channel and played the role in Sino-American relation improvement.This thesis is divided into three parts:Introduction introduce the reason that the Sino-American relation is hostile and isolation completely from uncertain during that China has founded to 1960's last.Text Part I, Expound the backdrop of reconciling Sino-American relation.The economy and military power of the USA have declined during 1960's last to 1970's early, and fall deeply into the Vietnam war mire.It started the reality and seeked the softening with China.Chinese government faced the suppression of Soviet and "the Great Cultural Revolution" chaos, sized up the situation and recongnize that Sino-Soviet contradiction greater than Sino-American's, So is really the maximal threat, China seized the opportunity of assuagement from the USA, and made the wise decision to improve relation with USA.Part II, Introduce three channels. Initially, China and American has chosen socialist state Romania, after trying for a period of time, both sides thinked it was unsuitable for the information delivery; thereupon, developing country Pakistan has been chosen the developing country , it is good with Sino- American both countries relation , exactly under its help, China and American beginning has known mutually, and helped to bring about Kissinger first time to visit China; Be unsuitable to new stage development of relations between China and the United States afterwards,Sino-USA agreed to open the Paris channel , which has accomplished the prepared work of Nixon's China-visiting outstandingly.Part III, Analyse the cause that three channels have replaced. Romania carries out the independent diplomacy, and compared with the Eastern Europe countries, has to betray confidently to Soviet .So China and American have chosen Pakistan that has simple relation with Soviet. It is the Chinese neighbouring country , and the number of the USA camp.Pakistan has geographical advantage and delivered information suitably more. Afterwards, because of the turbulent inland situation of Pakistan,it was no longer suitable the development of the Sino-American relation, France has political situation stabilizes, is the first country of western countries that established diplomatic relations with China formally; France carried out the independent diplomacy ang did not break away from west camp Simultaneously .Both China and American trusted it ,which made outstanding contributions for Sino-American relation unfreezed.The concluding remarks part makes summarization once again to three channels, explains that they are the front and back linking together, makes Sino-American relation unfreezed especially entire system of the process research. |