If the jewelry is broken, you can go to the store, jewelry repair shop, brand after-sales service center and so on.

1. Store purchase: If the necklace is purchased from a regular jewelry store or brand store, you can directly contact the original store for repair.

2. Jewelry repair shops: There are specialized jewelry repair shops in major cities, equipped with professional jewelry repairers and tools to carry out detailed and professional repair work.

3. Brand after-sales service center: For brand-name or high-grade jewelry necklaces, they can be sent directly to the brand's after-sales service center for maintenance by officially certified technicians.