Tiandao Shuttle System

The world is divided into ninth-grade worlds from low to high: first-grade world, second-grade world... Up to the ninth-grade great world. Each world is divided into four levels: low, medium, high, and ultimate: unqualified, third-rate, second-rate, first-rate, innate Qi refining realm, master foundation-building realm, grand master golden elixir realm, broken void Nascent Soul realm... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.