1, check the refrigerator nameplate: every refrigerator will have a nameplate, which is usually located on the side or back of the refrigerator. The nameplate will indicate the brand, model, rated voltage and other information of the refrigerator, and will also indicate the production date of the refrigerator.

2. Ask the seller: If neither of the above two methods can find the production date, you can directly ask the seller of the second-hand refrigerator, who generally knows the production date of the refrigerator.