Plugging error!!

Hy, someone can explain to me what is this problem? Thanks!!

Warning: An unexpected error occurred. Something may be wrong with ww.wp.xz.cn or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to ww.wp.xz.cn. Please contact your server administrator.) in /www/docs/globalexar.com/public_html/wp-includes/update.php on line 119