1. Open the idle fish software and enter "My Interface". On my page, click to enter the "Help and Customer Service" option.
2. Slide down the page, find the "Other Questions" option in the lower right corner, and click Enter.
3. Edit and send the words "credit card service", and click "Click here" in blue font in the customer service reply.
4. After that, enter the purchase interface of the free fish credit card payment service, find the "Buy Now" option at the bottom of the page to enter, and you can successfully operate.