I Am the Eldest Son of Li Shimin in Datang Dynasty

Traveling through the Tang Dynasty, Li Feng learned Xinglin's peerless acupuncture technique. When Queen Changsun was critically ill, he entered the palace and used the seven-star acupuncture technique to rejuvenate her. A single needle saved the queen of the dynasty, which attracted Sun Simiao's admiration, and a generous reward was at his fingertips. But during the treatment, the jade pendant around his neck and the green dragon birthmark revealed his identity. He was actually the eldest royal son of Emperor Taizong who had been missing for eighteen years! The reunion of flesh and blood was supposed to be in the East Palace, but the crown prince has been decided, and there are many factions in the court. In order to avoid chaos in the clan, Li Shimin had to postpone the recognition of his relatives. With the support of the system, god-level medical skills, and the orthodox bloodline of the royal family, Li Feng lurked in the market, befriended Cheng Chumo and other children of aristocratic families, practiced medicine to win people's hearts, and waited for the opportunity to shed his identity as a commoner and ascend to the top of power in the Tang Dynasty.