Hello world!

Here is how you can append a backlink to the RSS feed’s description content:

1. Access the RSS feed and retrieve the current content of the description.
2. Determine the URL of the original RSS feed.
3. Append the URL to the existing description content.

For example, if the RSS feed URL is `http://example.com/rss-feed`, the description would look like this:

“`html

Welcome to WordPress. This is your first post. Edit or delete it, then start writing!

Original article from RSS Feed.

“`

Make sure to modify the `

` and `` tags to match your needs or the content style and attributes of your site.