Support WBURWhat China's Thinkers Need Most Is Also Most ElusivePlay04:42Download AudioLouisa LimJune 05, 2012 ShareYang Weidong interviews a subject for his documentary project "Signal," which finds that the vast majority of China's intellectuals yearn most for freedom. He plans to interview 500 of China's top thinkers for the project. (Courtesy Yang Weidong)