Baoyi Qaghan
Baoyi Qaghan, or Alp Bilge Qaghan, was the eighth ruler of the Uyghurs. His personal name is not known; therefore, he is often referred to by his Tang dynasty invested title, Baoyi, which was invested on 22 June 808.
Reign
His personal name Baoyi in Chinese might be the translation of the Old Turkic name 'Boy'.He was known as a zealous Manichean and militarily active ruler. He demanded a Chinese princess from Emperor [Xianzong of Tang] by sending his minister Inanchu Külüg Chigshi on 24 June 810, but the request was refused. Xianzong's reason was the expenses involved. Xianzong asked Manichean priests to pursue Baoyi and drop the request. Baoyi used this opportunity to occupy Tiquan in April 813. Xianzong's minister of rites, Li Jiang, suspected that Baoyi would make peace with the Tibetan Empire to invade China. He suggested that Baoyi's proposal to marry a Tang princess should be accepted to further affirm the alliance between the Tang and Uyghurs. This suggestion was not accepted.
His request was only realized when he sent Ulu Tarkhan to Emperor Muzong, who married off his sister Princess Yong'an in 821. Baoyi died after marriage. He was succeeded by his son Chongde Qaghan.