Yong Zhengdi, the fourth son of Emperor Kangxi, had thirty-five sons in his life, and many people in Wang Zizhong had outstanding abilities, so Emperor Kangxi kept vacillating on the issue of heir to the throne, and finally decided to establish Yongzheng as emperor in his later years. Yong Zhengdi kept a low profile, so after Kangxi's death, many people were unconvinced by Yong Zhengdi's kindness.
When Emperor Kangxi was alive, nine sons usurped the throne, mainly in May when the Party and Yong Zhengdi competed for the position of Prince. Later, due to being rejected by Emperor Kangxi, May lost the qualification to compete for the throne, but there were still many princes following May, including Fei Yi's son, Ten Princes. Fei Yi is one of the favorite concubines of Emperor Kangxi. Emperor Kangxi loved Fei Yi more than many concubines, including Yong Zhengdi's biological mother, De Fei. When Emperor Kangxi was alive, Fei Yi was highly prized, and no one would say anything. However, after the death of Kangxi, Fei Yi was more polite than Yong Zhengdi's biological mother, which made Yong Zhengdi very uncomfortable.
At first, Yong Zhengdi's kindness was criticized by everyone. At that time, Fei Yi's behavior made Yong Zhengdi feel that Fei Yi was dissatisfied with himself, or that Fei Yi's son was dissatisfied with himself, so Yong Zhengdi would humiliate Fei Yi in public in front of Kangxi's coffin.