As a conspiratorial scheme，differentiation，which advocates that people should be honest and behave in a decent way，is often not mentioned in Chinese society. However，as a Western “differentiation，” a wedge strategy has been very popular in Western society. During the Cold War，the United States advocated and applied a wedge strategy to destroy the Sino-Soviet alliance and the separation of the relations between the Soviet Union and Eastern Europe became the key to divide and conquer. Therefore，an in-depth study of a wedge strategy has academic，policy，and strategic value. Based on the concept，mechanism，and case，Dr.Ling Shengli provides a panoramic perspective and an in-depth analysis of the wedge strategy，which provided countermeasures for China to cope with the U.S. wedge strategy in the Indian-Pacific region. Based on Dr.Ling’s analysis，we realize that the wedge strategy was not only an anti-alliance strategy focusing on dividing and dissolving alliances among rivals but also a long-term cumulative strategy focusing on defeating the enemy without fighting or winning without fighting. It was not only a prudent military strategy focusing on “strategy and diplomacy” but also a preventive strategy focusing on alliance resistance. The dividers influenced the interests of the allies by wedging them into an alliance，prompting rival countries to realize that joining a hostile alliance was not worth the cost，while betraying an ally was profitable. In the future，international power struggles will continue，the use of wedge strategies will not be limited，and research on wedge strategies will be furthered.