1-Send it to a small store when it is old, and the other party may have doubts about your gold content.

2- Even if you want to exchange the old model for a new one, you can only change it to our store.

3- If you buy a big brand, such as Chow Tai Fook, you can change it to Chow Tai Fook's new model, and the old money is easy to sell.