Chinese e-commerce group JD.com reportedly bought a majority stake in Hong Kong grocery chain Kai Bo, marking the mainland company’s latest effort to expand its global presence.JD.com spent HK$4 billion (US$509 million) to acquire 70 per cent of Kai Bo Food Supermarket, with the deal involving the grocer’s retail network and property assets, Hong Kong media outlet HK01 reported on Monday, citing anonymous sources.Kai Bo did not immediately respond to a request for comment. A JD.com...