Maybe they are clamping down because "the day of those who passed," is Monday?
We know the Chinese government doesn't like her citizens remembering those who passed in political terms.. there is always a clamp down. They have learnt their lesson in 1989 with Hu Yang Bo
China Hems In Social Networking
By IAN JOHNSON
Published: March 31, 2012
"BEIJING — China started a sweeping crackdown of its vibrant social-networking media over the weekend, detaining six people, closing 16 Web sites and shutting off the comment function for two gigantic microblogs.
"The campaign, which was announced late Friday and put in place in stages through Saturday, was directly linked to the political instability that has gripped China since one of its most charismatic politicians, Bo Xilai, lost his post in mid-March. That spurred rumors of a coup, which the government-run Xinhua news agency cited as the reason for the measures."
Later last year, the government announced that all microbloggers would have to register under their real name, a measure that was supposed to be enforced by the middle of March. Currently, users with pseudonyms can still post, but analysts say they expect the rule to be slowly enforced over the coming months.
The measures come during a difficult time for China’s leadership. Besides the scandal swirling around Mr. Bo, the party is preparing for a once-in-a-decade leadership transition later this year that has stirred up rumors and allegations."
Yan Sham-Shackleton Online 
China started a sweeping crackdown of its vibrant social-networking media over the weekend, detaining six people, closing 16 Web sites and shutting off the comment function for two gigantic microblogs.
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