"She is the wealthiest self-made woman in the world," said Rupert Hoogewerf, a researcher who has been compiling the rich list for seven years. Her fortune trumps that of US chat show queen Oprah Winfrey and the Harry Potter creator J K Rowling.
Her wealth was estimated at £202m last year, but the share price of Nine Dragons has tripled since she listed her company on the Hong Kong stock exchange and the market for recycled products is growing at a furious pace.
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