Can you recommend an ancient romance novel?

The male protagonist was a prince, and the female protagonist was his adopted sister. It seemed to be Gege or a princess. When she was young, she was sick or had an accident, which caused the female protagonist to be a little mentally retarded.
However, the female protagonist liked the male protagonist very much. She called him brother XX all day long. When she grew up, the emperor gave the male protagonist another Gege. The female protagonist was very sad. On the day of the male protagonist's wedding, he did not stay in the bridal chamber but went out.(It seems to say that the female protagonist is too sad and disappeared) , the female protagonist did not know who she met, drank the medicine, and became a beauty and spoke very normally. She met the male protagonist and slept for a night. The male protagonist fell in love with the transformed female protagonist at first sight. After returning to the mansion, he wanted to take the transformed female protagonist as a concubine. When he returned to the brothel, he found that the beauty was gone, and his identity was unknown. He only knew that she was not the woman in the building... I forgot about it later.

Answer 1

I recommend 'The First Woman of a General of Generals' to you. The plot introduction was that the heroine Xie Lingchu released a book called Modern Medicine, which recorded the secrets of immortality and resurrection. This is an ancient romance novel. You will not be able to put it down. I hope you like this fairy's recommendation. Muah ~😗