04:32In the StudioUnique Tour of Ai Weiwei's StudioBBC World Service Duration: 27 minutes Tue 28th Mar 2017, 04:32 on BBC World Service South AsiaAvailable for over a yearListen nowInside the underground warren that is artist Ai Weiwei's Berlin studio Show more GenresFactualArts, Culture & the MediaFormatsMagazines & ReviewsBrandIn the Studio Source: BBC Online