(No harem, no formulaic plot, no invincible protagonist. There is a System and transmigration, and the story unfolds very slowly, so please think twice before reading if that's not for you. The story will take its time while the protagonist is still a child, so if you don't like long novels, this may not be for you. I'm a new author. I'm open to criticism if there's anything I haven't written well, and I'm happy to hear readers' opinions.)
The story takes place in the World of Fengtian, after the plague is eradicated in the 21st century.
The [Undying Prison] reappears, and ferocious beasts return, intent on destroying Blue Star.
A slaughter game arrives from ten years in the future.
The Classic of Mountains and Seas, lost for a thousand years, appears on him as well.
It's pretty good. The system is like a book. The author has set up a very grand world view. It's still a long article, and the current protagonist is still a little kid.