At present, the gold price is higher than 18k, more than 300g. The price of buttons mainly depends on the style and the amount of money used. Simple 2-3 grams will do, and complicated ones will be bottomless. Personally, it is not necessary to cover the buttons of Qinghai materials. If you want to cover gold, it's much easier. After all, the price of gold may exceed the price of Ping An deduction.
I know the places where gold is wrapped: Yuquan Road Flower and Bird Market, Dazhong Temple Ai Jia Collection Market, and the fourth floor of Xidan Wedding Building, all of which have gold and silver jewelry processing, but Xidan's general orders are relatively large.