Zhang Xin is one of only 24 self-made female billionaires in the world. Her story is a true rags-to-riches tale. As a teenager she worked in a sweat-shop in her native China, by her twenties she worked for Goldman Sachs. Disillusioned by Wall Street, she returned to China to make her fortune in property development. But what kind of China did she return to - a country heading for economic problems or possibly an emerging democracy as well as an emerging super-power?(Image: Pan Shiyi (L), chairman of Soho China, and Zhang Xin, chief executive officer of Soho China. Credit: Getty Images)