Jin Guangyao works for a rather large trading company in Aefenglom (one large enough to have boats and warehouses at the harbor, as well as offices in the shopping district), helping with financial organization and accounting, but more importantly organizing a bit of trade between the Underground and Aefenglom. Taking advantage of the Mirrorbound's special status like that iiiiis a little questionable, probably. But it's not as if he can carry a whole convoy with him, so it in-person trade tends to be limited to smaller, higher-value goods.

He's also a member of the Mirrorbound Council and treats it like a second job even if it isn't, really.

Between those things (and sometimes quests) he's a very busy man snake naga, and works long hours, but always seems pleasant and polite. With running around for one thing or another, it's easy to find him just about anywhere in the city, or out on a trip to the Underground in person.