He was descended from the 拓跋 (Tuoba) clan of the Xianbei - the Northern Wei dynasty which ruled China from 365 to 534 CE.
[1] In 750 CE an embassy from the Kingdom of Jibin/Kāpīśi (罽賓國) in the north-east of modern Afghanistan, and adjoining Pakistan, arrived in the Chang'an asking for an alliance with China.
Joshi suggests that it may be identical with the Rāja-vihāra built by King Lalitaditya Muktapida (r. 724-760), the most powerful ruler of the Karkoṭa Empire of Kashmir.
As the "Chanyu" or leader of the Uighurs did not believe in Buddhism he had to leave the Sanskrit texts he had collected in the library of a temple in Beiting (Urumchi).
[7] The translated sutras and the tooth relic of the Buddha were presented to the Emperor and he was rewarded with official titles and given the name of Wukong.
It provides us with useful information about the political situation in the southern Hindukush and Taklamakan regions in an obscure and troubled period.