C842 Fire Controlling Technique

The second question, Jin Buhuan gave a strange scroll, and Gong Renyu had to identify the name and rank of the formula based on the herb combination on the scroll, which was quite difficult.

There were so many medicinal formulas in the world, and some people might not be able to learn them even if they spent their entire lives.

Hence, this was also one of the ways to measure a person's horizons