1. Automatic cash withdrawal: the credit limit of ABC's credit card can be automatically increased. The bank will automatically upgrade from time to time according to the cardholder's credit history and card usage.

2. Apply for withdrawal: Cardholders can also take the initiative to apply to the bank to increase the credit card limit. This can be done through ABC official website, mobile banking or calling customer service. When applying, you need to fill in the relevant personal information and withdrawal amount, and the bank will review it according to the cardholder's credit record and repayment ability.