At the dawn of the world, before Heaven and Earth had taken shape, a sorrowful tear fell from nowhere.
Under the influence of this tear, the world split in two.
One world had no anomalies, mysteries, or spirits, and was known as the material world. In the other, gods and demons ran rampant and monsters swarmed. It was known as the side world.
When the side world first took shape, a breath of primordial chaos gave rise to yin and yang. Yang became male, yin became female; yang transformed into gods, and yin into demons. Each side had its own domain, neither interfering with the other. Then, hundreds of millions of years later, Heaven and Earth underwent a great upheaval, and the two worlds became connected. Gods and demons began traveling between them.
Later, the Demon Lord personally led the demons into the material world, unleashing demonic power across the land and leaving countless creatures dead. The God Lord could not bear to see this. First, he launched a surprise attack on the Demon Lord, then drove back the many gods and demons still in the material world. Finally, using great divine powers, he sealed the passage between the two worlds so that they could never again cross over. All that remained in the material world were legends of Nuwa creating humanity, the Wu and Yao, the war between gods and demons, and many more.
...Cultivation...
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.
It became more and more confusing later on. I guess the author didn't even know what he was writing without reading the outline?