evidence: China made a mistake on the border issue and handed over 270,000 square kilometers of territory Jiangxinpo to Myanmar. Jiangxinpo has a superior geographical environment, rich agricultural resources, aquatic resources, high forest coverage and rich mineral resources, which has important strategic value. Jiangxinpo, this territory abandoned by China, was once part of the Chinese nation, but became part of Myanmar due to a series of mistakes. The loss of Jiangxinpo this time is not only a territorial loss, but also a failure for China on border issues. [...] China made a mistake on the border issue and handed over 270,000 square kilometers of territory Jiangxinpo to Myanmar. The loss of Jiangxinpo this time is not only a territorial loss, but also a failure for China on border issues. The article mentioned that the Qing government and the Republic of China government encountered difficulties in border management and were unable to effectively maintain border stability. In addition, local residents do not have high recognition of China, which puts China into a passive situation on border issues. In order to delineate the border line as soon as possible and to maintain border stability, China had to make the decision to abandon Jiangxinpo.