馬騰
In 194, Liu Yan's sons Liu Fan () and Liu Dan () allied with the warlord Ma Teng, who launched a military campaign against Li Jue and Guo Si, the warlords controlling the Han central government and the figurehead Emperor Xian. However, Ma Teng lost the battle and both Liu Fan and Liu Dan were killed. At the time, as Pang Xi was a family friend of Liu Yan, he turned to his network of friends for help in helping Liu Fan and Liu Dan's families escape from Chang'an (the imperial capital under Li Jue and Guo Si's control) and bringing them safely to Yi Province, thus preserving Liu Yan's posterity.