The bill cannot be modified under the following circumstances:
1, the date of bill modification has been recorded in a natural year;
2. The account is overdue or overspent at present;
3. You have an undistributed installment transaction;
4. The bill has not been issued since it was last modified;
5. No initial bill has been issued, but the transaction has been recorded;
6. In the case of multiple accounts, if there is no valid bill date range across accounts, the bill date cannot be modified;
7. The billing date of car installment card, parking installment card, owner's music, family music, new electronic credit card and official card account cannot be modified.