On February 6, 1922, the ¡°Nine Nations Convention¡± was signed in Washington, D.C. and on February 6, 1922, the ¡°Nine Nations Convention¡± was signed, entitled the ¡°Nine Nations Treaty on China¡¯s Events to Apply Principles and Policies¡±. In 1922, the ¡°Nine Nations Convention¡± was signed in Washington, D.C., the ¡°Nine Nations Convention¡± and the ¡°Principle¡± of the ¡°Nine Nations Convention on China¡¯s Events to Apply Principles and Policies¡±. This treaty was a gross violation of China¡¯s sovereignty, independence and territorial integrity. This treaty suppressed Japan¡¯s monopoly over China during the Great War, while the United States as the leader of Britain and Japanese imperialism jointly controlled China