In the Eastern Han Dynasty, when Liu Xiu gave the official seal to Japan, he actually had such a title, but at that time he called the king of Japan a slave king. In the later period, Japan kept studying China culture and exchanging ideas and cultures, only then did it know that Japan actually had a discriminatory mentality. Therefore, in order to change China's impression of them, the Japanese changed their character into a Yamato nation through constant changes. In China's ancient history, during Liu Xiu's period, Japan meant subordination, and Japan was a subordinate country of China. At that time, Japan didn't want to be a vassal of China, so it thought of changing its name. Moreover, when Japan presents adult men and women, it is directly called Japan because of its short stature. However, Japan did not want to change its name at that time. In order to change its name, it even changed several kinds, and finally chose to change its name to Yamato Nation. If Yamato is pronounced in Japanese, it means Yamato, so Japan finally became Yamato. However, even if Japan changed its name at that time, it has never been recognized. It was not until the Wu Zetian period that Wu Zetian agreed to change her name because of Japan's pleading. In fact, no matter what name the Japanese change, their culture is handed down from China, which is an eternal thing. Moreover, after Japan's national strength continues to grow, it is even more reluctant to become a Japanese country. Therefore, even if Japan is called Japan now, it has changed the fact that it was once a subordinate country of China. At the same time, due to the influence of China's Tang Dynasty culture, many buildings in Japan were built in imitation of the Tang Dynasty, and still retain a lot of China culture.