Alliance system is the cornerstone of United States foreign policy and a key tool for it to respond to challenges from competitors.In recent years,the United States has actively united the so-called"free world"to contain,encircle,and suppress China.Its goal in alliance strategy is to reorganize the alliance system and build a Western camp similar to the one that contained the Soviet Union during the Cold War.To this end,the United States continues to strengthen its military alliances,reshape its political and economic alliance system,and strive to push out China from its dominant liberal international order,thereby maintaining a shrinking version of the liberal international order.Moreover,the United States continues to strengthen the auxiliary regimes of its alliance system,using international trade control systems and domes-tic export control systems,requiring its allies to cooperate in preventing China from acquiring advanced technologies.In the future,the United States will promote the renewal of a military,political,and economic integrated alliance system,by building a so-called"free world"similar to the Cold War era,in order to drive the confrontation between China and the Western world.