Historically, your princess gave birth to six children in ten years. Why didn't Qianlong make her queen?

Why didn't Qianlong set up a queen? First, the imperial concubine was born in the Han army. In the Qing Dynasty, when Manchu and Han were unequal, imperial concubines were inevitably strongly opposed by Manchu nobles, and Qianlong did not want to be criticized for violating the patriarchal clan system. On the other hand, although your princess is favored, her family has no influence in the DPRK, so no one will fight for her.

The most important thing is that Qianlong has made Yan Yong, the son of the princess, a secret monarch. If the princess is made queen again, the minister of the DPRK will definitely think that Yan Yong is a prince. In order to avoid the recurrence of the tragedy of the nine sons of Kangxi dynasty, Qianlong can only not mention the post-establishment.