"Chinese authorities have imposed a traditional social media blackout
on the anniversary of the Tiananmen Square protests - but China's 'netizens' have come up with creative of remembering the massacre.
Some Weibo and Twitter users dubbed the anniversary 'National Amnesia Day', and certain words have been banned from the Chinese microblogging site, including the words 'remember', 'today', 'tonight', 'June 4' and 'Big Yellow Duck'.
The big yellow duck ban is in reference to a parody of the iconic
image of the tanks rolling into the square in central Beijing, with the
tanks replaced by big yellow ducks, akin to the current installation of
yellow ducks in Hong Kong harbour."
In other words, you can TRY to censor, but people are good at finding ways around it.