抗日战争的初期、太平洋战争爆发时期和后期 ,中美关系有着明显的发展变化。影响中美关系发展变化的因素 ,有历史因素、现实因素、“第三国”因素、中国因素、个人因素。 During the initial period of the Anti-Japanese War and during the outbreak of the Pacific War, the relations between China and the United States have shown remarkable changes. The factors that affect the development and changes of the Sino-U.S. Relations include historical factors, realistic factors, “third country” factors, China factors and individual factors.