/kloc-in the winter of 0/936, Chiang Kai-shek mobilized 30 divisions to gather in Shaanxi and Gansu to prepare for the sixth "encirclement and suppression" of the Central Red Army. On February 4, 65438, Chiang Kai-shek flew to Xi 'an and urged Zhang Xueliang and Yang Hucheng to "suppress * * *". Jiang threatened not to "suppress * * *", so he transferred the Northeast Army to Fujian, the Northwest Army to Anhui, and the Shaanxi-Gansu provinces to the Central Army, driving Zhang and Yang into desperation. In a dilemma, Zhang and Yang agreed to make up their minds to persuade Chiang Kai-shek to stop the civil war and unite against Japan. The "good theory" was invalid, and then "forced Chiang Kai-shek to resist Japan." On the morning of February, 65438+10, Zhang Xueliang and Yang Hucheng, after several unsuccessful attempts to remonstrate, carried out a "military remonstrance", sent troops to arrest Chiang Kai-shek in Huaqingchi, and arrested Chen Cheng and other military and political dignitaries in Xijing Guest House. The Xi incident broke out. On the same day, Zhang and Yang electrified the whole country and put forward eight propositions, such as releasing patriotic leaders arrested in Shanghai, releasing all political prisoners, opening up the people's patriotic movement, and guaranteeing people's assembly, association and all political freedoms. They also called the Central Committee of the Communist Party of China and invited the Chinese Communist Party to send representatives to Angola to discuss plans for resisting Japan and saving the nation.