C39 Cultivation System

The middle dantian is in the heart, this world is called the source of life, the upper dantian is in the head, this world is called the divine chamber. Chu Fei didn't know the details...

The stage of cultivating the source of life and the divine room was the so-called secret stage. After the Secret Realm was the Fourth Extreme Great Force, but Chu Fei didn't know which four extremes it was