The Four Currencies Integration In China And The Path Choose

China and Taiwan's WTO accession in 2001, after Hong Kong and Macao's return to themotherland one after another in 1997 and 1999, symbolize the four regions economiccooperation raising a new height. Monetary integration regarded as the highest level ineconomic cooperation has been put into agenda. The article assesses the necessity andimportance from different perspectives including the promotion to the great Chineseeconomic entity, the influence to the progress of RMB Internationalization, the improvementto RMB competition ability in Asia currency cooperation and contribution to the possibility ofpeaceful reunification. Cost income analysis indicates that the income exceeds the cost eitherin the short run or in the long run. Lastly we put forward to the path choose in the fourcurrency integration from the current reality. The paper is consisting of three parts. In the first part, we introduce the close relations of trade and invest in four regions. FromRMB internationalization and Asia currency cooperation visual angle, we investigate theimportance of four currencies integration. We also point out that it is helpful to resistmonetary financial crisis and promote the peaceful resolution of two sides' politicaldifference. In the second part, we utilize cost income analytic approach of economics with China'smonetary integration. The result indicates the income exceeds the cost either in the short runor in the long run. What we should do is to promote it with a rational plan in a suitableinternational political and economic environment. In the last part, the articles puts forward to the path choose. The first step is to carry onthe integration of HongKong Dollar and Macao Pataca. Secondly promote the corporation ofRMB and HongKong Dollar. Lastly finish China's monetary integration including NewTaiWan Dollar.