1. Applicable age range: All China citizens who are 18 years old (inclusive) to 65 years old, have full capacity for civil conduct, have a legal and stable source of income and solvency, and have a good credit status can apply to the card issuer with their valid identity documents and other documents required by the card issuer.

2. Required materials and certificates: You need to bring the original ID card when handling the main credit card of Qingdao Bank. If you apply at a bank outlet, in addition to your ID card, you can also bring your work certificate, social security records, provident fund records, asset certificates and other materials.