《后汉书·列传·南匈奴列传》
张奂以为单子没有能力统管治理国家事务，就把他关了起来，上书请立左谷蠡王为单于。
奂以单于不能统理国事，乃拘之，上立左谷蠡王。
Zhang Huan thought Chan Zhu did not have the ability to manage national affairs, and imprisoned him, petitioning to establish the king of Left Guli (Youli) as Chanyu.