 In 1936 he and Chiang reconciled and he was appointed commander-in-chief of Zhejiang, Jiangxi, Anhui and Fujian border regions, to eradicate communist activities in those places.During the Second Sino-Japanese War, Zhang Fakui commanded the 8th Army Group in the Battle of Shanghai in 1937, 2nd Army Corps in the Battle of Wuhan in 1938.He Commanded 4th War area from 1939 to 1944, defending Guangdong and Guangxi against the Japanese in South China, achieving a victory in the Battle of South Guangxi.