One more thing,
How can I change the posts page to get excerpt only?
For example, this page http://cwcat.com/blog/. I set the Blog page template as Front Page, then set the Posts Page in the reading setting of wordpress to this Blog page.
The page gets displayed, however with full content (although I have ticked the summary text only). In order for me to make it display part of the text, I have to put in the post content which is annoying sometimes.
Is there another way to fix it?