Great Tang: Born a Bastard, and My Father Is Li Shimin?

Li Yannian accidentally transmigrates to the Tang Dynasty. His mother tells him that his father, whose fate remains unknown, is none other than the current emperor, Li Shimin! “Good grief! Li Er is such a scumbag! He’s made me live with people calling me a bastard all these years!” Once he learns the truth, he immediately sets out to make his father answer for the debt of love he owes his mother. With the help of the medical skills he learned in his previous life, he overcomes one obstacle after another! One day, years later, Li Shimin stares at Li Yannian in utter confusion. “You’re saying... your biological father is Li Shimin?”