Tempering
The gold from the east needs tempering before it can be sold. The gold from the east is good, it just needs some tempering before it's entirely presentable. You know, tempering like you'd do in a forge.
れん
ね
None
The smithy where you're doing the tempering is just a rental (れん). You need a rental for your tempering because you haven't sold enough gold to own your own smithy yet. It's seen its fair share of tempering, so it's a pretty shabby rental…