In preparation for the anniversary of the 1989 Tianamen Square protests, Chinese censors reportedly blocked several search terms on the country's top microblogging site Sina Weibo, including "1989," "in today," "anniversary" and "big yellow duck." The odd water fowl reference was banned in response to a viral photoshopped version of the iconic 1989 photograph "Tank Man," which Weibo user Weibolg altered by replacing the tanks with superimposed photos of Dutch artist Florentijn Hofman's famous Rubber Duck floating sculpture.