One of China's most high-profile billionaire bankers has gone missing after his company said it had lost touch with him. The disappearance of Bao Fan, who founded the investment bank China Renaissance, comes after a crackdown on big technology companies over the past two years which Beijing said had been wrapped up. Mr Bao is a key figure in China's tech industry who has worked on major deals including e-commerce company JD.com's £1.6bn initial public offering. He also worked on the public listing of short video platform Kuaishou in Hong Kong. His disappearance comes after former China Renaissance president Cong…