First, Yongqi is Ganlong's favorite successor.
Although Qianlong had 27 children in his life, his favorite was May Yongqi. Yongqi loved reading since she was a child. When he grows up, he is not only knowledgeable, but also filial. He personally rescued Ganlong from the fire, so Ganlong always wanted May Yongqi to be Chu Jun.
However, since Kangxi's later years, nine sons took the throne, and the next heir no longer set up a crown prince. Yongqi was the first prince in Qianlong's life to be set up as a prince, and the title was a very noble word "Rong". In Qing history, another Rong was once the fourth son of the emperor shunzhi, and also his favorite concubine Dong E Fei. Shunzhi had intended to let him be the Crown Prince, so he made Yong Qirong, which also represented.
Second, out of love, I hope Yongqi and her son can be treated well.
Yongqi is Qianlong's favorite son, but she can't be the next heir in this life. Yongqi had gangrene when she was crowned king, and it was getting worse. As a country, Chu Jun is the cornerstone of the country, although it can't be a dying person. At this time, Qianlong made Yong proud. Although he relieved Yong's confidant, why didn't he tell his successor about Yong's position?
Even if Yongqi dies, there will still be a noble title of honor, and the sacrifices of later generations will inevitably be more grand. Yongqi had a son before his death, and the glory of his father before his death must be a blessing for him later, so Qianlong also dedicated his love for Yongqi to the title of Rong Wang Qin.