The Scorching Sun Department definitely knows there's a wandering merchant who trades and collects all sorts of things.
But that wandering merchant, even if he doesn't have anything against the Scorching Sun Department, always avoids them, and on top of that, the guy is basically a phantom—here today, gone somewhere else tomorrow.
The Scorching Sun Department tried tracking him for a while before, wanted to have a talk, and even if they couldn't recruit him, some cooperation would be good too.
But who would've thought, the wandering merchant just peaced out, went outside Divine Land to play Caspere for a good while, left behind some legends, got screwed over by some foreigners, stirred up a bunch of grudges out there, and only then came back.
After he came back, the Scorching Sun Department gave up trying to contact him.
Later on, they did buy a few things from intermediaries at his place, but the prices were just crazy high, so they eventually gave up on that too.