How big is the territory recorded in the ancient books of the Yuan Dynasty?

1279, Yuan Shizu conquered and destroyed China in the Southern Song Dynasty. According to the records in the Atlas of Chinese History, Handi, Monan, Mobei, Northeast (including Outer Manchuria and Sakhalin Island), Dongjiang (according to Tarim Basin, it reached Qingji in the west in the early Yuan Dynasty), Qinghai-Tibet Plateau, Penghu Islands, Jeju Island and South China Sea Islands were all within the jurisdiction of the Yuan Dynasty. After the Southern Song Dynasty, although there were many conflicts with Japan, Myanmar, Annan, Java and other countries, the territory generally tended to be stable. 13 10 During the Yuan Wuzong period, the Wokuotai khanate was divided between the Yuan Dynasty and the Chahetai khanate, and the Yuan Dynasty acquired the Moxi territory of the Wokuotai khanate, with a land area of13.72 million square kilometers (bounded by 55 north latitude in northern Xinjiang). If northern Xinjiang extends to the Arctic Ocean, it will be 22.67 million square kilometers.