1. Determine the loan amount. Because you chose the zero down payment method, the loan amount is equal to the total house price, that is, 1.3 million yuan.

2. Calculate the total repayment amount. The total loan amount is 6.5438+0.3 million yuan, and the annual interest rate is 5%, so the annual interest to be paid is 6.5438+0.3 million yuan = 65,000 yuan, and the repayment period is 20 years, so the total repayment amount is (6.5438+0.3 million yuan+65,000 yuan) 2 million = 2.73 million yuan.

3. Calculate the monthly repayment amount. If the repayment period is 20 years, that is, 240 months, the monthly repayment amount is 2.73 million yuan divided by 2.40, which is equal to 1. 1.38 million yuan.