Second, many of his children died young because he lived too long. The most famous is May Yongqi. Anyone who has seen Princess Zhu Huan knows that Yongqi is very favored. In reality, May Yongqi was also very popular with Emperor Qianlong. He was also the first person to be made a sovereign by Emperor Qianlong, but in reality Mei Yongqi was not as happy as in TV series. He died young, so he took the emperor. In addition to Mei's untimely death, there are many princes who died young and died young.
Third, apart from those external reasons, there are some internal reasons, that is, Emperor Jiaqing has a good personality and understands the overall situation. Emperor Qianlong appreciated it very much, and among the other philosophers, Emperor Jiaqing was my favorite.