Since the establishment of the People's Republic of China (PRC) in 1949, the transformation of the trianglar relations between the United States, the Soviet Union (Russia), and the PRC has not only been closely related to peace and security in the Asia-Pacific region, but also has been a major factor in world peace and stability. In the last fifty years, Washington-Peking-Moscow relations has been shaped mainly by factors including national security, ideology, economic and trade interests, and the balance of power. These five major factors will continue to shape the trianglar relations among the United States, Russia, and the PRC in the future.