Give a simple example: gold: the price of gold when it is sold is between 190 and 2 10-230 (the difference in this price lies in the process price difference).

Diamonds: If you see the bid of 1000, the bid is about 350-450 yuan, and then I'll tell you to give you a 20% discount and figure out how much you have earned.

Gemstones are similar to diamonds.

Let's talk about jadeite: some jadeites bid tens of dollars, and the general price is around 400.

K gold, in grams, per gram 150-200 (depending on the price of gold). When selling, it will be priced according to the price of each piece of jewelry, generally ranging from 400 to 480 per gram.

You probably understand these examples.