It's a larger regional area; what's shown there is (I think) the size of roughly eastern China (?)

That inland area is going to be semi-desert dry steppe, while the coasts are temperate to tropical forest and rain-forest. There's actually a huge Indonesia-like archipelago farther south that the client went back and forth on including and ultimately decided not to since it doesn't yet factor in to their setting.

One of the challenges of this map is going to be showing overlapping political claims - the setting is predominantly human, but there are also Kenku city-states in the mountains, some of which owe fealty to the large human empire that is situated in the central area of the coast and on that large island, but many of which are independent. To top it off, they have their own alliance systems, which I have to work out a way to show.