1937年12月23日,日军西路矶谷师团大举南侵。第二集团军总司令韩复榘畏敌如虎,望风而逃,失陷济南后又连连丢失泰安、大汶口、兖州、曲阜、邹县,日军兵临滕县。与此同时,日军东路板垣师团在占领青岛后,沿胶济铁路西进,迫近临沂。面临如此危殆的军事局面,1938年1月10日、11日两天,蒋介石在开封召开了第一和第五两个战区团长以上军官参加的军事会议,研究新的战略任务,明确提出, December 23, 1937, the Japanese West Valley Rockets Division massive invasion south. The second army chief commander Han Fu 畏 fear the enemy such as the tiger, the wind fled, lost Jinan, and then again and again lost Taian, Dawenkou, Yanzhou, Qufu, Zouxian, Japanese soldiers Lin Tengxian. At the same time, the Itagaki division of the Japanese East Road Division, after occupying Qingdao, proceeded westward along the Jiaoji Railway and approached Linyi. Faced with such a critical military situation, on January 10 and January 11, 1938, on the two days of January 10 and January 13, Chiang Kai-shek convened a military conference in which the first and fifth war chiefs and above officers and officers participated in Kaifeng to study the new strategic tasks and made it clear that,