http://kltd8518056.blog.163.com/blog/static/130098206200991310521396/
http://www.yeesky.net/doc/internationalrr.pdf
http://wenku.baidu.com/view/4b092906eff9aef8941e063b.html
http://www.unipie.com/blog/?x=cat:10
http://apps.hi.baidu.com/share/detail/17902878
