It's normal if it's knocked off. If there is no problem, it should be a quality problem. A well-known brand like this has a good reputation, but it is expensive. There is no need to spend such money to buy it. It is best to choose a mid-range silver jewelry brand, which is cheap and the process is similar. Many brands here in Shenzhen, such as Haoyinfang, Aiyou Jewelry, Heye, and, are all good in Shenzhen.