C1017 Advancing to the Upper Yuan

Since he had left a small tail behind, Wu Zhongyuan turned his head back to ponder... Previously, he had tried to use the mud and sand to quickly gather the Spiritual Qi, but in the end, he encountered a problem. That was that the ordinary Qi in the outside world could not be absorbed by the Spiritual Qi in the body. The two of them had been exhausted from fighting within the body. At that time