Jewelry and jade, the key to novice purchase is to look at the quality and authenticity. I suggest that you check the supplier's product inspection report of that year when you purchase goods. Whether it is a large enterprise or a small enterprise. As long as it is a regular jewelry production enterprise, the Administration for Industry and Commerce will conduct spot checks on the product quality of the merchants every year. You need to read this report. Also, when you buy goods, you must ask for the inspection certificate of each product. If there are no good merchants, no one can guarantee the quality of your products. For example, there are synthetic and processed jade. The cost is very, very low, and the precious metal is gold and silver. Some are completely fake alloys, some are straight outside and alloy inside. The cost difference is very large. So I suggest that you need a third-party national authority test. To know how real it is. Responsible for all consumers in China.