《元史·列传·卷九十二》
十月二十八日，世祖询问翰林诸臣： 以丞相领尚书省，汉唐有此制吗？ 
十月乙酉，世祖遣谕旨翰林诸臣： 以丞相领尚书省，汉、唐有此制否？ 
On October 28th, Shizu asked the Hanlin Academy ministers: Did the Han and Tang dynasties have the system of having the chancellor lead the Ministry of the Imperial Secretariat?