It's a Happy Wedding, and It's Not Easy to Marry a Princess.

[Substitute marriage + medical concubine + marriage first, love later + real and fake daughter] King Zhan accidentally fell into the water and suffered from congenital heart disease. His life was in danger. The imperial doctor declared that he would not live for more than half a year. Qin Baifu, the fake daughter of Anyuan Houfu, was thrown to Zhuangzi to fend for herself after her identity was revealed. On the eve of her haircut, she was taken back by the Hou Mansion with great fanfare, and she was actually ordered to celebrate His Highness King Zhan as his legitimate daughter. On the wedding night, Xie Yuan lifted up the red hijab that Yuanyuan was playing with in the water, his eyes were sinister, but the corner of his mouth was curved, lifting the bride's chin: "The Anyuan House deceived me with the daughter of a cheap maid, do you think they deserve to die?" Seeing that King Zhan, who was supposed to be seriously ill and dying, looked as normal and moved freely, Qin Baifu's long eyelashes slightly drooped, covering her eyes with surprise, and said: "Your Majesty is right." Xie Yuan raised his eyebrows: "Oh? Anyuan Houfu is not your natal family?" Qin Baifu lowered her head and said in a soft voice: "When you marry a chicken, follow the chicken; when you marry a dog, follow the dog." Xie Yuan laughed angrily: "You called me a dog?" On the eve of the wedding, the emperor visited Prince Zhan's mansion incognito. "Qin Jianshan, an old man, pretended to be a servant's daughter for marriage!" Xie Yuan smiled faintly, but the smile did not reach his eyes: "Father, don't worry, in the future... Just divorce." "I feel wronged by Yuan'er." … Later, he cleared all obstacles and became the crown prince. The emperor once again came in person incognito. "The Qin family is low-born and cannot bear to be the queen. Divorce her! You can choose the noble daughter of Kyoto." Xie Yuan regretted it. "There are thousands of noble ladies in Kyoto, but none of them can match Fu'er's smile."