How to use Pagebreak in TinyMCE

Dear everyone,

I and my team are working to develop our own CMS base on Yii framework.

But I meet a problem with pagebreak in TinyMCE, how to use it to pager the long article.

When I used "pagebreak" in TinyMCE editor, it only added <!-- Page break --> comment to content!

Would you like to show me, how to use this feature in TinyMCE and pager for the article.

Please help me!

Thank you so much!