In the self-introduction of the drama Basin Ghost,Baozheng told his thought,namely,being honest and clean,being integrated and impartial.The upright official culture was embodied by means of the image of Baogong.This image embodied the playwrights'thoughts of upright officials in old China.Meanwhile,this image,from its appearance to its development and to its maturity,had gone through some stages and had its deep social roots and social significance,which are worthy to be explored.