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"Open Door" policy of the United States was put forward at the time of the divided crisis in China. It contained two principles: "maintaining the territorial integrity and administrative integrity of China" and "safeguarding the fair trade of all countries in various parts of China", which is the United States putting forward a malaria strategy aimed at the powers, especially Russia and Japan. That is, the United States tries to give them the convenience of trade and business in China in exchange for China's sovereignty and territorial integrity and at the same time benefits China's economy. The "Open Door" policy successfully resolved the crisis in Northeast Asia that occurred in the late Qing Dynasty, and China was able to preserve its territorial and administrative sovereignty. Since being forced to open the door to the outside world, the Qing government felt confused for a long time in its diplomatic relations. The initial diplomatic policy was "unite Japan" and later changed to "unite Russia." Only then did the Qing Dynasty's "unite the US" policy find it the best diplomatic choice.

China Crisis and the qOpen Doorq Policy of the United States