Moving hosted wordpress.com to ww.wp.xz.cn

Have you see this?

http://en.support.wordpress.com/moving-a-blog/#moving-to-wordpress-org

That article also explains how to do it yourself – you need to export your content and then import to your new site. You’ll also have to set up a theme on the new site — note that the same theme may not always be identical between .COM and .ORG.