Going deep into that history studies in recent years with society develops,both China-foreign historian and sociologist teach this one door problem having given very high attention to secret Qing dynasty.The main body of a book is held studying range puts in range inner teaching the door in secret ,is emphasize the religion studying are same in entire a variant name of the Eight Diagrams religion occupying important position Qing dynasty in history teaching Shimizu ,is discuss once it's religious doctrine ,is teach self door becoming feeble and die process,time sets a limit for in Qianlong towards later stage.