sentences:  After the invasion of France in 1940, although the newly formed Vichy France was an ally of Germany, it continued to recognize the Kuomintang government of Chiang Kai-shek—which had to flee to Chongqing in the Chinese interior after the fall of Nanjing in 1937—rather than the Japanese-sponsored Reorganized National Government of China under Wang Jingwei.French diplomats in China remained accredited to the government in Chongqing.On 18 August 1945 in Chongqing, while the Japanese were still occupying Kwangchow Wan following the surrender, a French diplomat and Kuo Chang Wu, Vice-Minister of Foreign Affairs of the Republic of China, signed the "Convention between the Provisional Government of the French Republic and the National Government of China for the retrocession of the Leased Territory of Kouang-Tchéou-Wan".