[quote=@KabenSaal]
Sphere. The Men of the Woods can provide lumber for all the needs, in exchange for Iron. Since they don't have any mountians, and they don't like mining the forest floor, the rely on whatever sweeps through the forest rivers, and occasionally make Tamahagane, so they import iron through Bifrost.
[/quote]

Yes, but why would Xiang do that when they're sitting on a large forest that Aristo wants to remove anyways? Wood isn't exactly a high-demand commodity on Seyan.