1. First, open the JD.COM application and click the "Message" option below.

2. Then in the message interface, select the group chat to quit, and click Enter.

3. Then on the group chat page, click the "Settings" button in the upper right corner.

4. Then, in the settings page, select the "Exit Group Chat" option.

5. Finally, in the confirmation box that pops up, click "OK" to successfully exit the group chat.