Travel Through the Villain, but Just Lost the System

The Chen Dynasty lasted four hundred years. Above the temples, the powerful took over the power, and the emperor declined. Far away from the rivers and lakes, monsters are causing trouble and there are many sects. Outside the northern border, there are even more mysterious creatures watching. ... Han Tianqi traveled through time and passed into the protagonist of a book. But the name of the book is "Talented people emerge from generation to generation, and each leads the system for ten years of success". The time he traveled through was exactly after the protagonist had finished having fun and the system disappeared. And he is the ultimate cool person to become the next system host, that is, the villain. But the situation he faces seems not as simple as written in the book.