The United States, surprised, changed its policy toward the mainland to "quarantine," and signed the Mutual Security Treaty with Taiwan. At that time America set off in the search for "Who lost China?"
而美國硬生生被亂棒打醒，驚悚之餘，一方面對中共改採「圍堵政策」，並和台灣簽訂「中美共同防禦條約」，同時回頭認真追查「丟掉中國大陸究竟是誰的責任？」