You can call to raise the limit. To apply for a credit card limit increase, you can call the customer service number of the credit card center. After answering the phone, follow the phone voice prompts to transfer to manual service, then submit an application for a limit increase to the staff, provide the staff with your ID number and credit card number, and wait for the staff Verify your identity. If you meet the conditions, you will be informed that you can raise the amount. Otherwise, you will be refused.