1. First open Ctrip, click "Group Purchase", and select the category of Nezha Happy World on the interface.

2. Next, enter the interface, select the product you want to purchase, and click "Group Now" in the lower right corner.

3. Then fill in the purchase quantity and mobile phone number on the order interface, click "Next", select the payment method, and click to enter.

4. Finally, select the savings card, click to enter the payment interface, fill in the card number, reserved mobile phone number and verification code, and click "Pay".