Leading Chinese dissident and artist Ai Weiwei has said he was told by Credit Suisse that his foundation's bank account in Switzerland would be closed over his "criminal record" in China.<p>The activist, noted for architecture, sculpture and documentaries, has never been convicted of a crime.<p>Mr Ai, who left China in 2015 and now lives in Portugal, made the comments on website Artnet.<p>Credit Suisse told the BBC it did not comment on client relationships.<p>The contemporary artist famously designed the Bird's Nest stadium for the 2008 Beijing Olympics, but ran into serious problems after he spoke out against the Chinese government. This saw him spend 81 days in prison in 2011.<p>In the Artnet article Mr Ai wrote that in spring 2021 he had received a "surprising notice" from Credit Suisse.<p>"The bank informed me that it was terminating my account in Switzerland. They did this, they wrote, in accordance with a new policy of closing all accounts with people who have had criminal records. They believed (or pretended to believe?) that I had been convicted of a crime in China.<p>"Just a bit of homework could have shown them that I was never formally charged, let alone convicted of a crime."