proof of financial resources: it can be a payroll record issued by the bank, or an income tax withholding certificate, or a certificate of the market value of the house, car, deposit and investment (such as a copy of the real estate license/car driving license/bank time deposit certificate) and other materials that can prove your financial level. Other documents for reference include: personal account list of social insurance in recent 6 months, water and gas bills, credit card bills of other banks, etc.