It was a technique to cultivate qi in his body that he had learned from the monk Tai Si Kong.
Bai Zhe finished drawing the circle after a short time. He went to sit in the middle of the circle. If he had been another martial artist, he would probably have started to absorb the qi into his Dantian that instant. However, Bai Zhe explored the qi power around the mountain instead. Then, he adapted the qi in his body and made it similar to the qi power that was around him before absorbing them into his Dantian by inhaling the pure qi into his body. He directed them to his qi pulse points. When he exhaled, he would drive the dirtiness in his body out as well. Although this qi practice was easy, the body of the person who practiced this technique would get stronger and stronger each time that he practiced it. The highest level of this practice would make the body of the person who practiced it as strong as a god; even the most dangerous weapons of this world could not harm him.