If prepaid users do not recharge, China Unicom will automatically recycle their overdue numbers; if postpaid users are in arrears for more than 3 months, China Unicom will recycle their numbers. The fees owed must also be paid, otherwise you will become a blacklisted user and cannot handle China Unicom services. If you do not need to use it, please go to the local business hall to complete the account cancellation procedures. Under normal circumstances, bank cards and credit cards that have nothing to do with China Unicom business will not be affected. Since the policies of various cities are different, the specific local policies shall prevail. You can consult the local 10010 customer service or visit the local business hall in person.