The drawbacks of the“One Line” strategy were the fundamental reasons for the adjustments of China’s diplomatic strategy. The implementation of the “One Line” strategy exposed the Soviet Union’s strategic dilemma and enhanced China’s confidence to deal with the Soviet strategic pressure, which served as a precondition for China’s later strategic adjustments. However, the idea of allying with the U.S. against the Soviet Union gave the impression that China was asking for favors from the U.S., leading to the Reagan Administration’s retrogression on the Taiwan issue. In order to break the “One Line” strategy’s constraints on China’s U.S. policy, China brought this strategy to an end during the negotiations of the August 17 Communiqué in 1982, which in turn resulted in the adjustments of China’s diplomatic strategy. The adjustments changed China’s policies vis-à-vis the U.S., the Soviet Union, as well as the Third World: the status of U.S.-China strategic cooperation was downgraded, the door of Sino-Soviet rapprochement was opened, and relations with the Third World were reexamined.