Chapter 718 - Chapter 262: Pill Refinement_2

Looking up from the bottom, the two lowest levels of the cauldron, the chiwen typically have their mouths shut. Of course, it's good that they don't open their mouths, according to Zhou Chengxue's explanation. Generally, when both of them open their mouths, it means trouble is brewing. The chiwen extinguish fire, and they will spew out smoke and ash to release pressure and prevent explosions. If one is really unlucky, then an explosion would occur and naturally, only the cauldron's base would spit out the wasted remnants of the pills.