The world awaits an electric-car future, but that future is rapidly becoming the present in China. The country is on track to sell more than 1 million electric vehicles in 2018, nearly as much as the rest of the world combined. And with tens of billions of dollars already invested to build up an electric-car infrastructure (and tens of billions more on the way), China is not letting up in its pace to become the world leader in EVs—even as other countries mount their own efforts to compete for the drivers of the future.