Also known as the "Double Twelve Incident". Kuomintang generals Zhang Xueliang and Yang Hucheng launched a protest against Chiang Kai-shek. General Zhang Xueliang of the Northeast Army and General Yang Hucheng of the Northwest Army, after urging Chiang Kai-shek to stop the civil war and unanimously refusing to resist Japan, were reprimanded, they took advantage of Chiang Kai-shek's bid in Angola to launch a remonstrance on 1936+02 and 12, detained Chiang Kai-shek and his military and political dignitaries Chen Cheng, electrified the whole country, put forward eight propositions, and invited representatives of * *. With the help of the * * * delegation headed by Zhou Enlai, Chiang Kai-shek was forced to accept the conditions of stopping the civil war and uniting with communist party to resist Japan, and the Xi Incident was peacefully resolved, thus turning the civil war into an anti-Japanese national war.