extra from query url not from xml file.

url =
http://utils.usembassy.gov/feed2js/feed2js.php?src=http%3A%2F%2Fwww.beijingaqifeed.com%2Fshanghaiaqi%2Fshanghaiairrss.xml&desc=1&num=18&targ=y&utf=y&pc=y&words=40&