美日安保條約
When the PRC–Japan normalization was concerned, the PRC had been worried about some Japanese pro-Taiwan independence politicians. At the same time, the Treaty of Mutual Cooperation and Security between the United States and Japan (1960– ) has been a big problem for the PRC. In a point of the PRC's view, the military alliance treaty implicitly directs to the Taiwan Strait. It has become a big factor for Taiwan security affairs.