一级理论和二级理论的区别

Instead of continuing to practice, Ning Cheng began to study the thin book of exercises in his hand. This is a book on ordinary-level cultivation techniques. It has a detailed introduction from the first level of Qi Gathering to the ninth level of Qi Gathering, as well as some annotations on the techniques by the ancestors of the Ning family. What surprised Ning Cheng was that there were some simple spells behind this technique....