The following screenshots were taken on June 7, 2014, and show that Baidu's Japan search engine (which is blocked in China) returns over 800 results for a search for "25 Years Ago Tiananmen" (25年前天安门"). For the same search Baidu's China search engine returns no results, just an apology saying it cannot locate any web pages relating to that query.
Internet Censorship on the First Anniversary of the White Paper Movement
The White Paper Revolution, also known as the White Paper Movement, A4 Revolution, Blank Paper Protests, was a series of protests that occur...

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Translator's Notes: I have translated the crime that Wang Aizhong was convicted of (寻衅滋事罪) as "disturbing the peace." Other tr...
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Article 1. In order to regulate Internet information service market order, safeguard the provision of Internet information services and use...
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See also: Baidu Censors Diary of Du Daozheng - Former Head of China's Book Censorship Agency These screenshots were taken on July 1...