Four great compilations of Northern Song dynasty, namely: Extensive records of the Taiping era (978)
太平廣記|
太平广记, Imperial readings of the Taiping era
太平御覽|
太平御览, Prime tortoise of the record bureau
冊府元龜|
册府元龟, Finest blossoms in the garden of literature
文苑英華|
文苑英华