The high demon races within the Feiche country itself would receive a kind of honor award, allowing them to become the official guests invited to various large events and to stand out in front of the masses.
Why do this?
Although "fighting the local tyrants and redistributing their land" was exhilarating, the Feiche country was too small, and the Red Phosphorus country was too large, with too many vassal states and provinces, and the conservative demon races were too powerful. Ma Lin was as weak as an ant in a large river, and he had to be careful not to be swallowed by some massive creature; the diplomatic work had to be carried out well.
On the surface, Ma Lin elevated the status of traditional demon races and improved their situation, giving them ample face; in reality, the lower demon races in Red Phosphorus province gained true benefits, seeing their income increase by more than tenfold, and their lives became much better.