Datang: the Crown Prince's Identity Was Revealed After He Treated Empress Changsun at the Beginning

After traveling through time, Li Xuan came to the early Tang Dynasty. He unlocked the achievement system at the beginning and obtained the medical skills given by the system. Only by completing achievements related to medical skills can you improve your medical skills and even unlock the next skill. In order to complete his achievements, Li Xuan directly started free clinics again and again. Until one day, Li Xuanyi's clinic welcomed the trio of Li Shimin, Du Ruhui, and Queen Changsun. During the treatment, a jade pendant unexpectedly appeared on the way and was seen by Queen Changsun. -------------------------- After a while, Li Xuan was ready to leave Chang'an in order to achieve his next skill. Queen Changsun: Li Xuan, you can't leave Chang'an! Li Xuan: Why? ! Empress Changsun: You are the crown prince of the Tang Dynasty and the elder brother of Cheng Qian! Li Xuan:! ! ! The introduction is weak, please read the main text. If it looks good, 1 will be deducted. If it doesn't, please give me your opinion. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.