The application form of China Southern Airlines can be found on the recruitment page of China Southern Airlines official website or China Southern Airlines. The specific steps are as follows:

1. Open China Southern Airlines official website and enter the recruitment page of China Southern Airlines.

2. On the recruitment page, find options such as "Application Form" or "Download Application Form".

3. Click the option to enter the page of filling in the application form.

4. Fill in personal information, education and work experience in the application form and upload personal photos.

5. After confirming that it is filled in correctly, submit the application form to complete the registration.