The city that ancient Tokyo now refers to can be divided into three situations. The early Tokyo refers to Luoyang now, but it was not until the Northern Zhou Dynasty or even Luoyang that it was promoted to Tokyo. But in the Sui Dynasty, it was also called Dongdu, and later it was renamed Tokyo. Later, in the Northern Song Dynasty, the capital was Tokyo, which is today Kaifeng City, Henan Province. When it comes to China's ancient Tokyo, the mainstream view is Kaifeng. Kaifeng reached its peak in all aspects in the Northern Song Dynasty and was an international metropolis at that time. Another situation is that during the Liao and Jin Dynasties, many capitals were established. At this time, Tokyo is located in today's Liaoyang City, Liaoning Province.