中国网络审查“709案”数据曝光 封锁日趋精密复杂 (Citizen Lab: Censorship in China is increasingly precise and sophisticated)
Radio Free Asia, April 14, 2017
http://www.rfa.org/mandarin/yataibaodao/renquanfazhi/xl2-04142017100710.html
Related:
What happens when you try to send politically sensitive messages on WeChat
Quartz, April 17, 2017
https://qz.com/960948/what-happens-when-you-try-to-send-politically-sensitive-messages-on-wechat/
China’s party officials warned not to cross “red lines” while using WeChat
South China Morning Post, April 18, 2017
http://www.scmp.com/news/china/policies-politics/article/2088540/chinas-party-officials-warned-not-cross-red-lines-while
德媒，中国坚持死刑并且数字保密严重损害了中国的开放形象 (German media: China’s insistence to keep execution data secret seriously harms China’s open image)
Radio Free Asia, April 18, 2017
http://www.rfa.org/mandarin/yataibaodao/shehui/gr-04182017100631.html