6/4/89: Date of the Tiananmen Square crackdown.
64.89: Amount the Shanghai Stock Exchange fell on Monday, the 23rd anniversary of that event.
In a country where numerology is taken very seriously, Chinese censors quickly began blocking searches for “stock market,” “Shanghai stock,” “Shanghai stock market,” “index” and other related terms. They also deleted large numbers of microblog postings about the numerical fluke.
And even before tens of thousands of demonstrators, clad mostly in black, gathered several hours later around Victoria Park in downtown Hong Kong for the annual vigil, censors were also blocking searches for “Victoria Park,” “black clothes,” “silent tribute” and even “today.”