The official title of the Tang Dynasty was "Tang", which originally meant the ancient name of Jin, referring to the central and southern areas of Shanxi Province today. Tang Gaozu tang gaozu's grandfather Li Hu was one of the eight pillars of the Western Wei Dynasty, and posthumous title was the "Tang Gong". [27] Later, the title was passed on to Li Yuan. Li Yuan was left in Jinyang (now Taiyuan, Shanxi) during the Sui Dynasty. He set out in the name of Jingsui and went straight to Chang 'an every time he fought. After You Yang abdicated, he took "Tang" as his country name. Because the monarch's surname is Li, it is also called, and he is honored as Datang. [28-30]

In the prosperous Tang Dynasty, it played an important role in culture, politics, economy and diplomacy.

Tang dynasty territory

The social atmosphere of Baekje, Bohai Kingdom and Japanese warehousing in the Tang Dynasty also provided an unprecedented exchange and integration environment for all ethnic groups who entered Senegal since the Five Lakes and Sixteen Countries, and also learned a lot of foreign civilizations in the process. In the second half of the Tang Dynasty, China was in a historical transition period. The reform of land, salt, iron and tax system marks the social change. The prosperity after the middle period is mainly manifested in the prosperity of industry and commerce. [32-33]