Xinhua News Agency, April 11, 2012
http://www.chinadaily.com.cn/china/2012-04/11/content_15023880.htm
Related news:
香港观察：地下党，您好 (HK Review: Greetings, Secret Communist Party Member)
British Broadcasting Corporation, April 10, 2012
http://www.bbc.co.uk/zhongwen/simp/hong_kong_review/2012/04/120410_hkreview_secretcommunist.shtml