Li Chong's face was pale, with an undeniable fatigue, but his eyes were particularly bright, revealing excitement.
Once the internal and external fires reached a certain level, Li Chong once again lifted the furnace lid and instantly a fierce flame sprouted within the Pill Furnace, almost forming a column of fire shooting straight into the sky.
Suddenly, like a bolt of lightning, Li Chong threw the materials for the Bone Renewal Pill into the Pill Furnace one by one.
The moment these materials entered the Pill Furnace, they were reduced to liquid by the extremely high temperature.
The advantage of using Internal and External Fire was its high efficiency which skipped the step of reducing the materials into a liquid.
However, there was a very important point, and that was the control of the fire's heat.
