Rebirth of a Concubine: a First-Class Medical Concubine

Once he was reborn, he fought against his concubine and his sister-in-law, and all the masks of hypocrisy were torn apart! With a single hand of medical skills, he can save the alliance, resolve dangers, and bring relief to the world. It's just that there were a lot of peach blossoms along the way, the handsome and noble seventh prince, the elegant and calm young prince, the legitimate son of the Duke of the country, the prince of another country... Which one should she choose?