Li Guangbi
At the start of Emperor Xuanzong's "Tianbao" era (742-756), Li Guangbi became the discipline officer at Shuofang Circuit (朔方, headquartered in modern Yinchuan, Ningxia). In 746, the military governor ("jiedushi") of Shuofang and Hexi (河西, headquartered in modern Wuwei, Gansu) Circuits, Wang Zhongsi, made him a commanding general for Hexi Circuit, as well as the commander of Chishui Base (赤水軍, in modern Wuwei). Li and Geshu Han became the two key generals under Wang, while he was in command of Shuofang and Hexi. Wang often commented, "One day, Li Guangbi will have my command," and Li gained a reputation for being a good general. In 747, Li unsuccessfully tried to stop Wang from interfering with a campaign against the Tibetan Empire commanded by the general Dong Yanguang (董延光), and when Dong failed, Wang was removed from his post. In 749, he was made the deputy military governor of Hexi, serving under Geshu, and was created the title of Duke of Su Commandery in his own right. In 752, was made the deputy protectorate general at Chanyu (單于, in modern Hohhot, Inner Mongolia). In 755, An Sishun, then the military governor of Shuofang, requested him as deputy. An was impressed by him and wanted to give a daughter to him in marriage, but Li declined and feigned an illness in order to resign and return to the capital Chang'an under Geshu's assistance.