Find out where shortened URLs lead to without clicking
http://www.17cats.com/newblog/post/40f3cc1a/?tn=nyMbrNgHbAY5xA9S&utm=guang5
http://www.17cats.com/newblog/post/40f3cc1a/?tn=nyMbrNgHbAY5xA9S&utm=guang5