There are two "Tokyo" in the history of China, one is now Luoyang City, Henan Province, and the other is now Kaifeng City, Henan Province.

in the 25th year, that is, the first year of Jianwu in the Eastern Han Dynasty, Liu Xiu became emperor in Hebei. Because Liu Xiu was a descendant of the royal family in the Western Han Dynasty, his country name was still "Han", and Liu Xiu was Emperor Guangwu, the ancestor of the Han Dynasty. Because Liu Xiu established the capital of the Han Dynasty in Luoyang and Liu Bang established the capital of the Han Dynasty in Chang 'an, geographically east and west, later generations called the Han Dynasty built by Liu Bang the Western Han Dynasty and the Han Dynasty built by Liu Xiu the Eastern Han Dynasty. Luoyang, the capital of the Eastern Han Dynasty, is called Tokyo because Luoyang is east of Chang 'an.

in 581 ad, Emperor Wen of Sui usurped Zhou dynasty and established the sui dynasty, with Chang' an as its capital, which was called Xijing. With Luoyang as its capital, it is called Tokyo.

Because the capital of the Five Dynasties and Ten Kingdoms and the Northern Song Dynasty was in Kaifeng, Henan Province, which was the capital of the capital city at that time, it was called Tokyo. Correspondingly, it is "Xijing" Luoyang. Although Luoyang was not the capital at that time, it was also a very important city in the Northern Song Dynasty.