1. After the cancellation of a single card, if the credit card is still valid for 2 months or more, you can call the credit card customer service at any time and transfer to the manual customer service to apply for a card refund. 2. After the cancellation of the whole household, you can call the credit card customer service within 6 months from now and transfer to the manual customer service to apply for card refund. The final result is subject to the audit. 3. If you don't successfully apply for a credit card, you can reapply for a credit card. 4. Please contact the company's authorized personnel to issue an application form for business processing of corporate cards.