Pure Land of Mountains and Seas

As the mountains and seas and the beasts in the world gradually became violent, all the great powers in the world joined forces to seal the mountains and seas and beasts in another world, leaving only a "Book of Mountains and Seas" for future generations to remember. That other world was the "Pure Land". Thousands of years later, the seal gradually loosened, and the power of the seal was selected from the mortal world. More than a few thousand people entered the Pure Land and became "Tianwairen". They practiced with unique cultivation methods and quelled the catastrophe of alien beasts... Today, the seal of the Pure Land has been loosened again, and nearly 10,000 people have entered the Pure Land. An unprecedented catastrophe is coming. How will the new generation of "Tianwairen" deal with it...