Can't a princess ascend the throne?

Outsiders always thought that Ying Jiuque was weak and unable to take care of herself, and was plagued by bad luck, frequently stumbling upon crime scenes.
Until the emperor's birthday banquet, she effortlessly blew half of the assassin's skull off with a brick...
Ying Jiuque wiped the blood from his hands: [Would they believe me if I said I just did it on a whim?][Would they believe me if I could make salt, know where the gold mines are? Would they believe me if I could lead troops into battle?]
The old emperor, having heard her thoughts, said: "...This child is simple and honest, and she didn't ask for anything in return for saving my life. She should be rewarded!"
Afterwards, just as no one understood why the old emperor trusted Ying Jiuque so much, allowing her to rise rapidly from county princess to high rank, Ying Jiuque also couldn't understand why those people were so foolish.
Could it be that she possessed superhuman strength, compassion for the common people, and meticulous planning... all for the sake of a nominal title like Princess?
Princess of the county, princess of the prefecture, count, duke, general... and then the uncrowned king who commands the northern border!
What else, besides that supreme position, could bring her peace of mind next?
Can't a princess ascend the throne?
Power has always been the best supplement for women.

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