Christopher Goh, Benedict Wong and Andrew Koji in #aiww: The Arrest of Ai Weiwei by Howard Brenton
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Arrest of Ai Weiwei play has world premiere in London

18 April 2013 Last updated at 12:56 BST

Howard Brenton's #aiww: The Arrest of Ai Weiwei draws on conversations between the Chinese artist with British journalist Barnaby Martin about Ai's imprisonment in 2011.

The hashtag in the title is a reference to Mr Ai's prolific use of the social networking site Twitter, where he has more than 200,000 followers.

After he was released, the government claimed that his 81-day imprisonment related to tax evasion.

The play, directed by James Macdonald, stars Benedict Wong as Ai Weiwei.

The BBC's Tim Masters spoke to the playwright Howard Brenton following on opening night at Hampstead Theatre in London.