A True Refiner

Fei Hong stretched out his hand beside the Furnace to feel the temperature, nodded slightly, took the black diamond, and applied a layer of black heat-gathering agent on it! Then, operated the rocker arm to open the lid of the cauldron, and threw the black diamond in!

After the lid of the furnace was closed again, Fei Hong opened several air vents again, and the fire in the furnace became more fierce. And he turned around and set another Furnace on fire. When the temperature was high, he threw the mold into it!

This time, Old Man Wu was dumbfounded: This bastard, what kind of refiner wanted to warm up the mold before the ore melts? ! This was common sense. If two things with high temperature are put together later, either the mold would break instantly, or the two things would be glued together. How could it be successfully refined?