雪花飘理论

Backing away from the lake, Ning Cheng found a giant tree with a diameter of nearly fifteen meters. He planned to practice in the center of the giant tree for the time being. There are not many trees with a diameter of more than ten meters on the earth, but they are everywhere here. The tree Ning Cheng found wasn't even the thickest. It was just because he could directly see the movement in the lake while practicing in this tree....