After World War II, General Order No. 1 ordered the forces of the Empire of Japan in Taiwan to surrender to Generalissimo Chiang Kai-shek. The Republic of China appointed Chen Yi as the Chief Executive of Taiwan. He arrived in Taiwan on 24 October 1945 and received the last Japanese governor, Ando Rikichi, who signed the document of surrender on the next day. On the next day, Chen Yi proclaimed Taiwan Retrocession Day. The validity of the proclamation is subject to some debate however, with some supporters of Taiwan independence arguing that it is invalid, and that the date simply marks the start of a military occupation by the Republic of China.