1. Open the WeChat application and enter the "Discovery" page.

2. Locate and click Applet on the Discovery page.

3. On the applet page, search and find the official account of "Miracle Kingdom" WeChat.

4. After entering the official WeChat account, find and click "Member Center" or similar labels or buttons.

5. On the member center page, you should be able to find relevant settings or exit options.

6. Click on the relevant settings or exit options, and confirm to exit the membership card binding according to the prompt.

Please note that the above steps are for reference only, and the specific operation may be different due to the update or revision of the official WeChat account. I suggest you operate according to the actual situation, or directly contact the official account of WeChat, and the customer service team of Fun Kingdom will ask for help.