Ma Lin was busy constructing three new cities in the Great Fish Country.
The Great Fish Country was twice the size of Hua Xia Country, vast and sparsely populated, with a harsh environment and abundant resources.
There were many extremely ferocious demonic races, inherently evil, finding it difficult to accept human culture.
The original rulers needed their armies and also admired their combat prowess, hence, they granted them numerous privileges.
In the new era, these demonic races became the most dangerous criminals, who liked to kill and eat people, unwilling to be disciplined. The carrot-and-stick approach held no appeal to them, and they didn't care about it either.
As for how to deal with these demons, the Dragon Prosperity's viewpoint was to adhere to tradition, not to attempt to annihilate them but to limit their range of activities, allowing them to live or die off on their own territory.