Add Disqus into Hexo based Github Pages

1 Add Disqus to Hexo based on this instruction.

2 Switch on/off on a specific page or post.
The Disqus is default to be valid on all pages/posts, if you want to disable comments on one specific page/post, add the following command to the front-matter in the .md file of that page/post.

comments: false

For example, add comments: false to the front-matter in the page of publication .