Because her nephews were having a hard time controlling their powers, Bai Meiyue arranged for a training centre to be built for the sake of training the two of them. There was no other way; both Bai Qian Han and Bai Jiuque had powers that couldn't be used on others. One with fast ageing and the other with gloom fog, Bai Meiyue was worried that if she allowed others to fight with the two of them, it would unleash pandemonium.
So, they came up with the idea of building a training centre. With Bai Zhan and the researcher, along with her barter system, they created a training centre that allowed the two boys to cause as much trouble as they wanted. The devices that she bartered in the barter system allowed her to create a four-dimensional real-life action of the post-apocalyptic world. Thus, her nephews learnt how to deal with the zombies the easy way.
