From ancient times, the Cursed Wilderness was classified into three sections: Inner, Middle and Outer.
Even after Ajax became the Emperor of the World, he didn't bother to change it and let the Spirit Beast Kings from the Cursed Wilderness and the King Realm Cultivators from the rest of the World come to a new agreement.
In the Outer Section of the Cursed Wilderness, the humans can kill the low-level spirit beasts as they wish and the Spirit Beast Kings and Generals won't bother about it.
In the Middle Section of the Cursed Wilderness, the cultivator can enter; however, the Spirit Beast King had already informed them that there would be many Spirit Beast Generals guarding that section. So, the humans should be ready to die.
However, if the humans dared to enter the Inner Section of the Cursed Wilderness, the Spirit Beast Kings would personally make moves and kill the humans who dared to enter the depths of the Cursed Wilderness.