sentences:  After nominal rule over Shanghai was turned over to the Nanjing Nationalist Government by Japan in November 1940, Chen was appointed mayor.In mid-1944, when Wang traveled to Japan for medical treatment, Chen was left in charge as acting president of the Executive Yuan, becoming president of the government upon Wang's death in November 1944.At the end of World War II Chen fled to Japan and, immediately following Japan's formal surrender on September 9, 1945, China's representative Gen.