In the post-loan management of personal commercial housing loans, the management and inspection work carried out by the loan handling bank specifically includes: ① regularly knowing the changes of the borrower's customer information; (2) Check the relevant banking system regularly; ③ Check whether the status, value and ownership of the mortgaged property have changed at least once a year; (4) Check the default reasons of the default loan and whether there is any illegal operation; ⑤ Regularly check whether the borrowers with large loans and "one-person multi-loan" can repay the loan principal and interest on time, and whether there are factors that affect the timely repayment of loans; ⑥ Timely collect loans in arrears, and collect borrowers who can't be contacted by telephone and other communication methods; ⑦ Check whether the overdue loan is within the limitation of action, and whether the loan principal and interest notice is legal. Therefore, this topic chooses ABCDE.