As Zhang Yu's proficiency in refining Tianqing sand reached Level 2, countless images of refining Tianqing sand flashed through his mind: the operation of various mana and Gang Qi, the manipulation of materials, the control of the heat, the details of spraying the composite fiber membrane, the experience of stabilizing mana circuits...
One memory after another of refining emerged in Zhang Yu's mind, giving him a sudden and deeper understanding and insight into the refining of Tianqing sand.
Thus, when he attempted to refine Tianqing sand again with one-tenth of the materials, the success rate suddenly increased significantly.
Moreover, the quality of Tianqing sand visibly improved.
Ye Xingli, who was standing aside, looked at the finished Tianqing sand refined by Zhang Yu, slightly surprised: "The color is bright, the impurities and purity seem to be much better than before... Is it Level 2 Tianqing sand?"
"Is it just luck? Or is he really progressing fast?"
