C1992 Apologize

"This …"

Hearing Ye Xu's words, Qing Yun was stunned and frowned slightly.

She had once vaguely heard Pill Monarch mention the problem of wood to make pill carbon.

When calcining the pill carbon, due to the difference in the intensity of the fire, there would be a situation where the quality of the same batch of pill carbon would vary. It was the same as when refining pills.

However