The State Administration of Radio, Film, and Television issued a directive on 30 March 2009 to highlight 31 categories of content prohibited online, including violence, pornography, and content which may "incite ethnic discrimination or undermine social stability". Many netizens believe the instruction follows the official embarrassment over the rise of the "Grass Mud Horse" phenomenon. Industry observers believe that the move was designed to stop the spread of parodies or other comments on politically sensitive issues in the runup to the 20th anniversary of the 4 June Tiananmen Square protests .  Following the government's directive, most Chinese essays and blog postings made about the Grass Mud Horse have been removed from the Internet after being discovered by government censors.  Some of these citizen efforts to keep the Grass Mud Horse alive have moved offshore to the . and elsewhere, including for example the creation of an independent Canadian publishing house (see Mudgrass Press ) referencing the meme.