Income certificate issued by the unit, personal income tax payment certificate, and bank statement issued by the bank for the past three months.

1. Income certificate issued by the unit: You can apply for an income certificate from your unit, including wages, allowances, bonuses and other income. This certificate should include the unit’s title, name, position, salary amount and other information.

2. Income certificate issued by the company: Self-employed persons or those who run their own companies can apply to the company for an income certificate. This certificate should include the company's title, name, position, company's turnover, dividends or profits and other information.

3. Bank statement issued by the bank for the past three months: You can apply to the bank for a bank statement issued by the bank for the past three months, which can show the source of income and capital flow.