Briefly describe the main historical facts of the contacts between the Tang Dynasty and Uighur, Mohong and Nanzhao.

Huihe

After the demise of East Turkistan, Uighur moved south and joined the Tang Dynasty. In the twenty-first year of Zhenguan, the Tang Dynasty established the DuDu House in the Uighur Department and appointed the Uighur Chief as the DuDu House. In the third year of Tianbao (744), Emperor Xuanzong of the Tang Dynasty conferred the title of Huihe leader Guli Pelo as Huairen Khan. During the Anshi Rebellion, Uighur sent troops to help Tang Ping rebel.

Mohe

In 698, Mo established the Earthquake State (later renamed Bohai Sea), and its leader Da was made King of Bohai Sea in the first year of Kaiyuan in Tang Dynasty (7 13). During the reign of Emperor Xuanzong of the Tang Dynasty, Heishui County was located in a big tribe, with the governor as the leader.

Nanzhao

Nanzhao Piluoge unified six imperial edicts. The following year, Emperor Xuanzong of the Tang Dynasty gave him the name of Meng Guiyi [3] and made him the king of Yunnan.