After the establishment of the Tang Dynasty, Silla sent envoys to the Tang Dynasty in 62 1 year. In 660, Baekje United with Koguryo, which hindered the traffic and tribute between Silla and the Tang Dynasty. In 660, Baekje fought with the Tang Dynasty and Silla to destroy Baekje. Later Silla became a vassal state of the Tang Dynasty. Although between 670 and 676, Silla and Tang Dynasty had frictions and conflicts because of the disappearance of the same interests, the relationship between the two countries was not interrupted.
In addition to the political tribute relationship, Silla is also very close to the Tang Dynasty in economy and culture. Many Silla people went to the Tang Dynasty for trade or development. Culturally, Silla asked for books from the Tang Dynasty many times, and the most important way was to send overseas students. The close and friendly exchanges between Silla and the Tang Dynasty lasted for more than 200 years, which was not only the highest in the Sino-foreign relations in the Tang Dynasty, but also unprecedented in the history of the relationship between ancient China and the Korean Peninsula.