[Wufei lifts both brows at the humming trick, but nods in agreement.] Man-made, but yes. As for design... something that at least appears plain. He grew up very poor, so having something too elaborate would make him uncomfortable... perhaps simply making the ring appear like a braid?

[Design is not his strong suit, but he's trying.] Or, if he's shown you the cross he wears, a design that would complement it. [That cloud is back to the bronze color, as his brow furrows a little, pondering the design options and trying to be sure he picks the 'best' one.]