China Industrial and Commercial Bank, China Construction Bank, China Bank, China Agricultural Bank and China Postal Savings Bank. According to relevant information, the banks that handle mortgage loans are these five banks:

1. China Industrial and Commercial Bank provides various types of loans, including personal loans and corporate loans.

2. China Construction Bank is one of the four state-owned commercial banks in Chinese mainland and one of the largest banks in the world, with huge loan funds.

3. When handling loans, China Bank can directly apply for credit loans if its customers' credit status is good enough.

As a state-owned commercial bank, Agricultural Bank of China provides various credit products and services, including personal loans, corporate loans and financial leasing.

5. China Postal Savings Bank can provide various loan services, including personal loans, enterprise loans and rural credit cooperatives loans.