C468 difficult pill formation

When the fifth type of medicinal ingredient successfully turned into powder, Ling Xiaotian's forehead was covered in sweat. Wu wu. Pill refining this time didn't consume too much energy, but it had dragged on for too long. From the beginning till now, half an hour had already passed.

"You old fogey, why are you so slow this time?" Ling Xiaotian said: "It's already been so long