Minister Tang Xiao's contribution first introduced the laws and regulations of the Tang Dynasty, which promoted the innovation of Japanese social system. When he sent Tang to Chang 'an, he eagerly studied and read a lot of books. After returning to China, he joined the central government and imitated the Tang system. For example, the Dabao Law was formulated according to the laws and regulations of the Tang Dynasty. It also imitated the educational system of the Tang Dynasty and set up various schools to teach Chinese studies and cultivate talents. In 8 18, Emperor Emei, on the advice of the envoy to the Tang Dynasty, Sugawara Kiyohara, issued a decree to change the etiquette, ordering that "all men's and women's clothes should be made in the Tang Dynasty" (Great Japanese History, Volume 123), and even calendars, festivals and customs should be imitated by China as much as possible.
The second is to learn from the culture of the prosperous Tang Dynasty and improve the level of Japanese culture and art. Every time he sent envoys to the Tang Dynasty, he brought back a large number of Buddhist scriptures in Chinese, and officials and people competed to praise and write Tang poems in Chinese. The poems of Bai Juyi, a famous poet in the Tang Dynasty, are widely circulated in Japan. The student monks studying in the Tang Dynasty also created Japanese pseudonyms with Chinese radical or cursive script. The envoys also introduced calligraphy, painting, sculpture, music, dance and other arts from the Tang Dynasty, which were digested and transformed into Japanese national culture.
Even techniques such as Go and sumo and polo were introduced from the Tang Dynasty. Japanese painters, musicians and even Go experts often come to the Tang Dynasty to learn skills and watch games.