" China already manufactures almost three-quarters of the world’s lithium batteries. The electric car also fits into a larger vision of an electric transportation network inside China—high-speed electric rail connecting cities where people move around in electric cars, or on electric buses and electric bicycles. By the end of 2017, over 50 percent of China’s city bus fleet was already electric. "

― Daniel Yergin , The New Map: Energy, Climate, and the Clash of Nations