Legal analysis: proof of income must be at least 2.2 times of the monthly repayment amount. Only in this way can we meet the bank's loan regulations. If you pay a mortgage of 2000 yuan every month, your income will be at least 4400 yuan.

Legal basis: Article 680 of the Civil Code of People's Republic of China (PRC) prohibits high-interest lending, and the lending rate shall not violate the relevant provisions of the state. If there is no agreement on the payment of interest in the loan contract, it shall be deemed that there is no interest.