His RSS only has < description > part, doesnt' have < content:encoded > part.
Other RSSs in the xys-reader blog which have < content:encoded > part, including dzl and fangzouzi's, work fine in Bloglines.
So my suggestion is:
First: how to make < description > part perfect? answer: Add < pre > tag.
Second: If we don't want to modify < desctipion > part, we can let taicu to add the < content: encoded > part. How to do it? I don't know.