Zisu truly struggled to grasp the concept of four hundred million, for after all, in the Otherworld where development was limited by agricultural technology, there always existed a threshold for the population, once reached, it would lead to severe famine.
Thirty years before Earth's intervention, the population of the Western Continent in the Otherworld was just about that number. But with Earth's agricultural and other related technologies introduced one after the other to the Western Continent, the population there had multiplied several times over thirty years, with several northern countries of the Aud people becoming populous nations.
As for the eastern Continent on this side, Luo'er didn't know the situation in Kyushu. But after an in-depth visit to West Outer Heaven, Luo'er gained a relatively clear understanding of the plight of the Demon Clan.
