Great Tang: I Mistook Li Shimin for My Real Father

Ye Fan transmigrates to the Tang Dynasty, knowing little about the world outside. He originally plans to keep his head down at home, but accidentally mistakes Li Shimin for his father, who hasn't come home in over a decade. From then on, more and more people start showing up around him.

Ye Fan discovers that his words soon become court policy, every prediction he makes comes true, and all kinds of big shots disguised as ordinary people flock to his home.

It seems the Tang Dynasty isn't all that dangerous after all. Ye Fan gradually begins venturing out, only to realize that powerful people are backing him in everything he does, and someone is always there to clean up after him... Anyone who crosses Ye Fan eventually gets dealt with.