The world’s first pure electric zero-emission double-decker bus, designed and built by Shenzhen-based carmaker BYD, is displayed at a U.K. Trade and Investment event in London, Britain, on Wednesday. The bus is to enter service in London by the end of the year. Chinese investment into low-carbon London black cabs and a deal involving luxury sports carmaker Aston Martin are part of a series of business announcements Wednesday during the state visit by Chinese President Xi Jinping to London. China and London secured deals worth about 40 billion pounds (US$62 billion) Wednesday. (More on P3, 4)SD-Agencies