C381 Marrow Cleansing

The room seemed very quiet. Zhang Bai was like an old monk who had entered a meditative state. At this moment, he had fully immersed himself into his own cultivation world.

He slowly felt the fluctuation in his body. Then, he began to consolidate and guide it bit by bit.

"What was the reason for the sudden fluctuation in my body last time?" This problem had always troubled Zhang Bai