public function em_mark()
 {
     global $_lang;
     $aid = keke_user_mark_class::get_user_aid($this->_guid, 1, null, '1');
     $str = '';
     foreach ($aid as $k => $v) {
         $str .= '<p><span>' . $v['aid_name'];
         $str .= '<em class="cc00">' . $v['avg'] . $_lang['fen'] . '</em></span>';
         $str .= keke_user_mark_class::gen_star2($v['avg']);
         $str .= '</p></span>';
     }
     return $str;
 }