BYD Co Ltd was originally established as a battery producer. Now the company's operations are centered upon automobiles, especially new energy vehicles, but it also sells conventional fuel vehicles. Other business activities of the company cover electronics, new energy, rail transport and more. BYD Co Ltd not only has R&D institutions—such as the Automotive Engineering Research Institute, Smart Automotive Ecology Research Institute, Truck Research Institute, and Passenger Vehicle Research Institute—but also has more than 30 production sites around the world.