《新五代史·列传·唐臣传第十六》
后来以镇州为北京，拜任圜为工部尚书，兼真定尹、北京副留守代理留守事，当政有惠爱之心。
其后以镇州为北京，拜圜工部尚书，兼真定尹、北京副留守知留守事，为政有惠爱。
Zhenzhou later served as the Northern Capital, Ren Yuan was bestowed the position of Minister of the Ministry of Works, and concurrently the magistrate of Zhendiing, deputy garrison commander of the Northern Capital and acting garrison commander. He enjoyed benevolence and love of the people during his governance.