“Ai Weiwei, male, 53 years old. On April 3, 2011 around 8:30, at Beijing Capital International Airport, before boarding a flight to Hong Kong, he was taken away by two men. More than fifty hours later, present whereabouts remains unknown.
Please, anyone who knows the whereabouts of the above, contact the family.”
That was the flyer that began circulating on the Internet after Chinese artist and activist “disappeared.”