《新五代史·列传·唐臣传第十六》
从此刘赞更加努力学习，考中进士。任罗绍威的判官，离开后又任租庸使赵岩的巡官，再任孔谦的盐铁判官。
由是赞益力学，举进士，为罗绍威判官，去为租庸使赵岩巡官，又为孔谦盐铁判官。
Since then, Liu Zan studied even harder and passed the imperial examination. He served as the judge of Luo Shaowei. After leaving this position, he served as the inspector of Zhao Yan, the envoy of taxes and miscellaneous duties, and then served as the judge of salt and iron under Kong Qian.