全面抗战爆发后，1937年8月，蒋介石在南京召开国防会议，各地军政要员云集南京，研究抗战战略及军事部署问题。8月15日会议结束，蒋介石到云南省主席龙云下榻处，作礼节性拜访，言谈中，龙云提出日军可能会全力切断中国的国际交通线，中国必须早做准备，为此建议修筑滇缅公路 After the full-scale resistance war broke out, in August 1937, Chiang Kai-shek held a national defense conference in Nanjing. Military and political officials from all over the country gathered in Nanjing to study the strategy and deployment of the war. When the meeting ended on August 15, Chiang Kai-shek went to the guest house of Chairman Yun Yun of Yunnan Province for his courtesy call and speech. In his speech, Long Yun proposed that the Japanese army might try its best to cut off China’s international traffic lines. China must make preparation as early as possible. Burma Road