Chinese ride-hailing giant Didi Chuxing’s autonomous driving subsidiary is planning to raise as much as $500 million at a valuation of about $6 billion, Bloomberg reported. The move comes as bankers and investors expect Didi, one of the world’s most highly valued venture-backed startups worth $62 billion, to go public later this year. Ahead of the highly anticipated IPO, Didi is redoubling its...