On the eve of her wedding, the System told her: Tomorrow, the groom will publicly demote you from wife to concubine.
On her wedding day, in front of all the guests, she removed her phoenix crown, drew her sword, and left the estate. That very night, she knocked on the palace gates. When her half of a jade pendant matched the two halves kept before the emperor, she discovered she was the orphaned daughter of the emperor's eldest princess, whom he had been searching for for over a decade.
The next day, she became the dynasty's first Crown Princess.
Faced with doubts from the entire court, she followed the System's prompts to benefit the people, earning enough merit to complete her mission.
Childhood friend: She's no longer engaged! This is great! (Happy puppy wagging its tail) She's the Crown Princess now. Am I about to become unworthy of her? (Dejected puppy)
This setting is a bit novel. I have never seen anything like this. The heroine has three backings, the general, the prince, and the emperor. No matter what, this villain can't defeat the heroine [Bookshelf plus one] [Bookshelf plus one] [Bookshelf plus one]