Your blog posts have been archived... they are definitely saved and available for a free download!
http://yansan321.xanga.com/

You can download them by signing in here:
http://xanga.com/wp-login.php

Now you have a copy of your blog posts on your own computer. Now you can do one of two things:

1. Upload your archives to another site that's compatible with your blog archives.

WordPress.com is one such free site... more information on how to import your archives into WP here: http://en.support.wordpress.com/import/import-from-xanga/

2. Upgrade your account to Xanga 2.0, and stay on Xanga.
You can use PayPal (can also pay via credit card through this page) to purchase a one-year membership for Xanga 2.0: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=WSTANQDA9BAC2

If you could forward your Paypal confirmation email along with your username to help@xanga.net, we will get your site upgraded ASAP.

Thanks,
Eugenia at xanga.com