《资治通鉴·宋纪·宋纪十一》
周朗出发前辞行时，正赶上侍中蔡兴宗在值班。蔡兴宗请求和周朗道别，于是，他也被削去官职，以平民的身份代理现职。
朗之行也，侍中蔡兴宗方在直，请与朗别；坐白衣领职。
When Zhou Lang was bidding farewell before leaving, it happened that Cai Xingzong, the Minister of Attendants, was on duty. Cai Xingzong asked to bid farewell to Zhou Lang, so he was also removed from his post and became an official in charge of acting matters.