How to exclude certain pages from CDN caching?

Control Panel V5 > Hosting Control Panel > CDN
1) Go to CDN section to get your cloudflare login email address and password.
2) Login to cloudflare, click on your domain.
3) Go to Overview,you will see "Purge Cache".

4)  Click on "Purge Cache", you will see below buttons. You can purge everything or purge a certain page by fill in the specific content URL.