《史记·七十列传·张丞相列传》
陈余打跑常山王张耳，张耳投归汉王，汉王就任命张苍为常山的郡守。
陈馀击走常山王张耳，耳归汉，汉乃以张苍为常山守。
Chen Yu defeated the King of Changshan, Zhang Er, and Zhang Er returned to Han Wang. Han Wang appointed Zhang Cang as the prefect of Changshan.