C654 Refining Infant Pills

"Puff!" On the fourth time, the flames invaded Wang Xiaohu's heart. He carefully controlled the intensity of the flames, but because there were less impurities in the pills, controlling the temperature of the flames only burned the impurities and did not harm the pill itself, the difficulty increased by more than one fold.

Although it was a pity, Wang Xiaohu didn't feel too much heartache