Tang Jingling, a Guangzhou lawyer, was invited to the Guangzhou College of Vocational Technology on November 27 to lecture students on the internet.
[H]e was interrupted by a member of the campus security force who was auditing the class, and was told to show his identification before being led away by police.
“As far as I know, leading Chinese Web sites and forums were all cautioned not to discuss Twitter, which may now be monitored by special task forces,” Bei said.