《资治通鉴·后周纪·后周纪二》
南唐祠部郎中、知制诰徐铉进言贡举制度刚开始设立，不应马上停止，于是又实行。
唐祠部朗中、知制诰徐铉言贡举初设，不宜遽罢，乃复行之。
Xu Xuan, Minister of Rites and Consultant of Nantan, suggested that the imperial examination system had just been established and should not be stopped immediately, so it was resumed.