Find out where shortened URLs lead to without clicking
http://www.17cats.com/newblog/post/8bd418d9/?avg=Vrd0HeCZMl1aQZ8A&utm=guang5
http://www.17cats.com/newblog/post/8bd418d9/?avg=Vrd0HeCZMl1aQZ8A&utm=guang5