1. Measure the opening diameter of the broken chain with a common ruler and connect it with a silver split ring with the same diameter. 2. Go to the local jewelry store and ask the welder to put some tin on it. 3. Find a jewelry store that can match the new chain with the same model, material and size. When wearing silver jewelry, don't wear other precious metal jewelry at the same time to avoid collision, deformation or wear. Keep the silver ornaments dry, don't swim in them, and don't go near hot springs and seawater. After each wear, you can gently wipe the surface with cotton cloth or paper towel to remove moisture and dirt, and then put it in a sealed bag to avoid contact with air. The best way to maintain silver jewelry is to wear it every day, because human oil can produce a natural and moist luster. Avoid intentional polishing. Silver wet wipes contain silver maintenance ingredients and cannot be washed. If you don't handle and collect the silver jewelry after wearing it, it is very likely that the silver jewelry will turn black. At this time, you should use a small jewelry brush to clean up the fine seams of jewelry, then drop a drop of silver emulsion on the paper towel to wipe off the black oxide on the surface of jewelry, and then use a silver cloth to restore the original brightness of jewelry. After that, remember to do daily general maintenance to prevent the silver ornaments from turning black again. It is difficult for silver ornaments to turn white after blackening many times.