One is the processing fee. This is a major source of income, although the income is not much, but there are many tricks in it, which need skilled masters to do.

The second is the service fee. For example, regular cleaning seems to be very cheap and clean, but the jewelry will be washed less and less. Not long ago, a 30-gram necklace was washed into 20 grams for others. Can it not make money?

The third is to sell gold and gold ornaments.

If the above three items are completely formal, they won't make much money. If you want to open such a shop, you must have a good master, otherwise you won't make any money. Of course, such a means of making money is not flattering and does not support you. What experts tell you is the routine operation, and what I said above is their secret, so it is easy to ignore people.

As for the purchase channels, every place is different, there are above-ground and underground, depending on your style, making less money on the ground and more money underground is risky.