郭淮
Deng Ai later became a military adviser to the Wei general Guo Huai and served as the Administrator of Nan'an Commandery (南安郡; around present-day Longxi and Wushan counties, Gansu). In 249, he followed Guo Huai to resist an invasion led by the Shu general Jiang Wei. After the Shu forces were repelled, Guo Huai advanced west to attack the Qiang tribes. Deng Ai cautioned him: "The enemy did not retreat far. They might turn back to attack us again, so we should split up our forces in case they attack us again."