Visitors stopped from Beijing on carpet of seeds . But with the seeds , too much dust , at Tate Park . Ai famous for co - founding Beijing 's ` ` Bird 's Nest '' stadium . But they hold greater significance for Ai , who spent his childhood in Xinjiang as the son of a celebrated poet exiled by the Chinese communist government during the Cultural Revolution . Also well - known blogger and outspoken critic of Chinese government .
Visitors stopped from Beijing on carpet of seeds . But with the seeds , too much dust , at Tate Park . Ai famous for co - founding Beijing 's ` ` Bird 's Nest '' stadium . Also well - known blogger and outspoken critic of Chinese government .