2. Avoid long-term exposure to humid air or areas directly exposed to strong sunlight, and prevent oxidation and darkening of metal surfaces due to contact with air.

3.Store jewelry properly: When not wearing alloy jewelry, put it in a dry box or bag to avoid contact with air and oxidation.

4.Use professional cleaning agents: If alloy jewelry has been oxidized and discolored, you can use professional cleaning agents to clean it, but pay attention to whether the ingredients of the cleaning agent are suitable for the material of the alloy jewelry.