Reprocessing or recycling. Old necklaces can also be reprocessed, and stores will redesign or make new jewelry. Old necklaces can no longer be processed, and the store will recycle them for subsequent resource utilization. Zhou Dasheng is a jewelry brand, and its trade-in service means that customers can give their old gold and silver jewelry to the store and get a certain discount to buy a new Zhou Dasheng necklace. The store will dispose of the old Zhou Dasheng necklace.