1. Material problem: Zhou Dasheng Sutuan bracelets are often made of gold, and some fake and shoddy products will use other metals, such as copper and iron, instead of gold. If you are not sure about the material of the bracelet, you can try to send it to a professional jewelry testing institution for testing.

2. Technological problems: The craftsmanship of Zhou Dasheng Sutuan bracelets is often very fine, but some fake and shoddy products are flawed or defective.