When the sword was being forged, there was a flame that could melt the Sky-Mending Crystal, but there was no equipment for forging the sword. No sword-making furnace could withstand the flames on the Suiren wood. In desperation, Ou Yezi brought the sacred weapon ranking The fourth Shennong Cauldron is temporarily used to replace the sword-making furnace. With time accelerating, it took ten thousand years of smelting and forging before we could 'ask the sky'!...