After Pan Gu split the heavens and the earth to stabilize the Vast Wilderness world, he chose to transform himself into the heavens and the earth, with every part of his body transforming into the myriad things of the world, such as his spine becoming Mount Buzhou which connects the heavens and the earth, and his navel turning into a vast sea of blood.
The Sea of Blood was boundless, with surging waves of blood. No fish thrived, nor did birds or insects approach. The world's resentment, grudges, and evil qi, and other impurities mostly gathered here.
Since it was located in the gloomy nether regions, the Sea of Blood was also known as the Netherworld Blood Sea by the myriad races of the Vast Wilderness.
After Houtu transformed herself into reincarnation and opened up the netherworld underworld, the cycle of the six paths of reincarnation was located near the Sea of Blood.
