Datang: Bastard Starts, the Real Father Is Actually Li Shimin?

Li Yannian accidentally traveled to the Tang Dynasty. The father who was told by his own mother that his life or death was uncertain was actually the current emperor Li Shimin! "Good guy! This Li Er is such a scumbag! I've been called a bastard for so many years!" After learning the truth, he immediately decided to set out to seek an explanation for his mother's love debt back then. The medical skills I learned in my previous life will help me overcome difficulties step by step! One day several years ago, Li Shimin looked at Li Yannian with a confused expression. "You said... Your biological father is Li Shimin?"