Abstract: Wei Zhu lived from the middle of Kangxi reign ( 1661—7122 ) to the middle period of Qianlong reign ( 1736—1795) ． His records appeared in large numbers after the 44th or 45th year of Kangxi． The likely reason was because Wei Zhu served as the Head Eunuch at that time． Because he was trusted by the Emperor and held senior positions in the palace，Wei Zhu often behaved badly． Yongzheng disliked Wei Zhu，so he found an excuse to crackdown on him． Wei Zhu was sent to Kangxi's mausoleum，and his liberty was restricted． Yongzheng dealt leniently with Wei Zhu and Qianlong forgave him again． Wei Zhu had served in the Hall of Imperial Longevity and the Palace of Eternal Longevity，and lived until the 26th year of Qianlong． On the surface the reason why Yongzheng cracked down Wei Zhu was that Wei Zhu built a house on a mausoleum site destroying the fengshui． In fact the reason was that in Kangxi old age Wei Zhu kept good relations with Yunsi and Yuntang who were Yongzheng's rivals for crown prince，and so Yongzheng was hostile to Wei Zhu． The reason that Yongzheng cracked down Wei Zhu was not necessarily because Wei Zhu witnessed the deathbed scene of Kangxi and knew the secret that Yongzheng ascended the throne through improper means，or，in other words，usurped the throne．