http://www.bj.xinhuanet.com/bjpd_sdzx/2006-04/20/content_6795927.htm
http://www.bjkp.gov.cn/bjkpzc/kpxx/62956.shtml
http://www.cnsa.gov.cn/zhbd/show.asp?id=2596772
http://www.capumit.org.cn/ReadNews.asp?NewsID=630
http://www.stdaily.com/gb/stdaily/2006-04/20/content_514007.htm