1. Open WeChat and click "Address Book".
2. Click "WeChat official account", and then click "Hohhot New City Center for Disease Control and Prevention".
3. Click "Appointment for Physical Examination", enter the mobile phone number and verification code, and click "OK".
4. Enter the "Physical Examination Appointment" interface and select the date and place of physical examination.
5. Click "Submit" to complete the appointment.
I hope the above information can help you solve the problem. Please feel free to let me know if you have any other questions.