How it works guogao.com? Where i can exchange it?

You must login guogao.com with QQ openid.
So , first reg a QQ openid
http://zc.qq.com/chs/index.html

http://www.bi-5.com/d/file/news/2014-01-11/151565f347844a75a8a72014274c007b.jpg

http://www.bi-5.com/d/file/news/2014-01-11/e64ca773ebf308a3ec5fc30633685bc1.jpg

Now ,try to guogao.com
http://www.guogao.com/?f=23708

http://www.bi-5.com/d/file/news/2014-01-11/19716b4ee70263f95bacd12c5826df32.jpg

http://www.bi-5.com/d/file/news/2014-01-11/469fb2234b866a916245ce7748a89e54.jpg

http://www.bi-5.com/d/file/news/2014-01-11/988ba82d53ca8fc51ac304e0acd50fbb.jpg

http://www.bi-5.com/d/file/news/2014-01-11/b55e0128def6d0b373b05920d00078d3.jpg