On this day, 92 years ago, May 31, 1933 (May 8, 1933 in the lunar calendar), China representatives were forced to sign the Tanggu Agreement. On May 22, 1933, the "North China Armistice Conference" that signed the "Tanggu Agreement", at the behest of Chiang Kai-shek and Wang Jingwei, He Yingqin sent Xiong Bin as the chief representative of China to negotiate with Nagamura, Deputy Chief of Staff of the Kwantung Army, on the Tanggu warehouse upstairs. On the 31st, the representative of China agreed to the draft armistice agreement proposed by Japan without changing a word and formally signed the Tanggu Agreement. The agreement stipulates that (1) the Chinese army will withdraw to areas west and south of the front line such as Yanqing, Changping, and Tongzhou, and cannot advance across the line;(2) in order to confirm the implementation of paragraph 1, the Japanese army can inspect by aircraft or other methods at any time, and the Chinese side shall protect it;(3) When the Japanese army confirms that China has complied with paragraph 1, it will automatically withdraw to the Great Wall Line;(4) The Chinese police agency will be responsible for maintaining public security in the areas south of the Great Wall Line and north of the line shown in paragraph 1. The agreement actually acquiesced in Japan's occupation of the three northeastern provinces and Jehol.