张九龄
Pei Yaoqing (; 681–743), courtesy name Huanzhi (), formally Marquess Wenxian of Zhaocheng (), was a poet and politician of the Chinese Tang dynasty, serving as a chancellor during the reign of Emperor Xuanzong. He had a friendly relationship with fellow chancellor Zhang Jiuling, and when another chancellor, Li Linfu, managed to convince Emperor Xuanzong that both Zhang and Pei were engaging in factionalism, both were removed, although Pei continued to serve in important positions in the imperial administration until his death in 743. He was known for improving the food transportation system between the capital Chang'an and the eastern capital Luoyang, obviating the need for the emperor to periodically move between the two capitals.