Several people have contacted me saying they are having trouble submitting comments to my blog. I apologize for the trouble. Does anyone know if there is a general problem with comments at WordPress.com right now? You can try to leave a comment or send me an email (See Contact at the top of this page for my email address.)
One way to always make sure your comments appear is to write a post on your blog mentioning my post. The WordPress system will list your blog post under Comments.

Hi Ling
I often visit your site and find it interesting and helpful.
This is a test to see if commetns are coming through.