1, individual customers should hold the corresponding identity documents and accounts, go to the outlets or check the statements through self-service channels. Generally, the longest period is not more than three years;

2. If there is any objection to the payer, it is generally not acceptable to ask for paper files;

3, the judicial organs can query, generally need the person in charge at or above the county level to sign a notice of assistance in the inquiry, directly delivered to the outlets, free of charge, not prevarication;

4. If the regulatory authorities have reliable evidence to prove that it is necessary to inquire about the accounts, they must be signed by the person in charge of the institution at or above the provincial level before accepting it.