李勉
In 755, the general An Lushan rebelled at Fanyang, and by summer 756, the forces of his new state of Yan were approaching the Tang capital Chang'an, forcing Emperor Xuanzong to flee to Chengdu. Emperor Xuanzong's son and crown prince Li Heng, however, did not follow him to Chengdu, but fled to Lingwu instead, where he was declared emperor (as Emperor Suzong). Li Mian followed Emperor Suzong to Lingwu, and was made "Jiancha Yushi" (監察御史), an imperial censor. At that time, everything at Emperor Suzong's court, including his palace, was makeshift, and the officers lacked discipline. On one occasion, the officer Guan Chongsi (管崇嗣) was sitting with his back to the palace, considered a disrespectful posture. Li Mian submitted an indictment against Guan, and Emperor Suzong, while pardoning Guan for his indiscretion, stated, "It is because I have Li Mian that the court even has any discipline." In 757, after Tang forces recaptured Chang'an and were attacking east and seeking to recapture the eastern capital Luoyang, which had become the Yan capital, there was an occasion when over 100 Yan captives were delivered to Chang'an, to be executed on Emperor Suzong's orders. Li Mian submitted a petition stating: