In his later years, kangxi did not explicitly designate the candidate for the crown prince, so that most of the adult princes launched a cruel nine-son conquest incident, although in the end the fourth brother Yinchen became a dark horse to break through the siege, but the other princes involved in this competition ended up more miserable than one. And because this incident involved many factors such as courtiers, siblings, and family affection, although Yin Chan eventually ascended to the throne, he still could not get rid of the cold-blooded insult of killing his brother and killing his brother, and even the evaluation of him in later generations added a bit of cold and murderous meaning. However, unlike Yongzheng, his son, the Qianlong Emperor who later ascended the throne, had a total of seventeen sons before his death, and the thing that he thought would be another struggle for the throne did not appear, but he achieved the most reasonable replacement of the throne during his reign.
In fact, in the first year of Yongzheng, Yongzheng, who had witnessed the ferocity of the conquest of the concubine, realized the harm of not establishing a crown prince, and he considered that if he did not establish a crown prince in the early days, the future imperial power struggle would not only affect his control of the regime, but also let his sons go their own old way. Therefore, the so-called Li Chu has become a fact that has to be established for Yongzheng. However, due to Yin Rong's previous experience, the practice of Ming Li Chujun was obviously undesirable, so he created a system of private crown princes, and gradually became customized. Because of this formulation, Qianlong became the first person to benefit from the private crown prince.
From this, Qianlong deeply understood the intention of his father's deeds, and in the first year of Qianlong, he began to select among his own princes to become the crown prince of the next year with the rules of "following the imperial examination style, writing secret instructions in person, and collecting according to the previous one", and completed the general election of the crown prince early. However, this system also happened to use a strict secrecy system to prevent the ministers above the court from accurately judging the real candidates for the crown prince, thus avoiding the phenomenon of their early taking sides and confusing the imperial program, on the other hand, it also avoided the phenomenon of the princes pulling the courtiers to consolidate their power, and minimizing the possibility of the nine sons taking the concubine.
In the third year of Qianlong, Qianlong published the edict with Yonglian's name written on it, and at this time, Empress Fucha's concubine Yonglian died of illness, and this secret edict lost its original significance because of the death of the concubine, but the ministers probed the rules of Qianlong Lichu from this public secret edict, that is, to take the concubine as the first candidate for the throne. So for the other princes, Empress Fucha was the only one who could threaten them to compete for the throne. After that, the second son was born, and when the other princes thought that there was no hope of taking the concubine, they did not expect the early death of the second son and the death of Empress Fucha, and finally stopped Qianlong's idea of once again wanting to write the concubine into the secret edict. In the following twenty-six years, Qianlong gradually realized the covetousness of the princes for the throne that the princes were gradually showing, and the matter of establishing a crown prince was imminent.
So he came up with a way to curb the princes' seizure of concubines, that is, to give political favors to concubines in the harem. After empress Fucha's death, the Nala clan was made empress shortly after the intervention of the empress dowager, and the twelve princes and thirteen princes she gave birth to became the most likely candidates to inherit the throne, which caused the remaining princes to suspend their desire for the throne for a while.
Although a very serious empressial conflict broke out later between the Nala clan and Qianlong, resulting in the abolition of his empress position and the involvement of the other two princes, for Qianlong, the position of empress dowager of the harem has not been vacant, especially the edict he issued after yonglian's death, which clearly conveyed to the princes the message of a crown prince passing on his concubine, so that the dispute over the concubine was not staged again.