A deceptively simple question has become an obsession for Chinese artist Yang Weidong: "What do you need?"
For the past four years, Yang has posed the question to more than 300 Chinese intellectuals, and the results illustrate a startling level of discontent among China's thinkers.
As for the answer, one word pops up time and time again.
"I need freedom," says writer Chang Ping.
"I need freedom of speech," says economist Mao Yushi.
"I need freedom of expression," says poet Ye Kuangzheng.