Thousands of years ago, a young man holding an astrolabe and the Demon Lord peeked into the heavens in Jiuyou Mountain, which attracted three thunders, splitting a crack that sealed all the demons. A few years later, the Wuyou Continent was in chaos. Buddha said everything has cause and effect.
Finally, the young man used himself as an eye to set up a huge formation, and seven fairy mountains rose on the mainland, sealing all the demons into the cracks again.
Thousands of years later.
Things have changed, and Jiuyou Mountain has long become a barren mountain.
The Juejing Valley sank into the Thornless Basin and became a purgatory.
However, within the Eight Wastelands, the seven fairy mountains are still there, and outside Liuhe, the Heaven of Infatuation is still there, and the Sea of Lihen is still there.