Li Guangbi
In 756, Yan forces approached Chang'an, forcing Emperor Xuanzong to flee to Chengdu. Emperor Xuanzong's son and crown prince Li Heng did not follow him to Chengdu, but instead fled to Lingwu, where he was declared emperor (as Emperor Suzong)—an act that Emperor Xuanzong later recognized. One of the major generals that Emperor Suzong employed in the war against Yan was Li Guangbi, and Li Guangbi invited An Baoyu to serve under him. In 757, An Baoyu petitioned Emperor Suzong for a name change—stating, "Your subject has lived in Liang Prefecture for generations. I am ashamed to bear the same surname as the rebellious subject." Emperor Suzong granted him the imperial surname of Li, and also permitted him to change his designated home to Chang'an—considered a substantial honor at the time. This was applied retroactively to his Sogdian ancestors as well, all of whom would be referred with the surname Li instead of An.