Pollution control is one of the top priorities of the Chinese government. Closing polluting industries or moving them away from cities is an obvious solution, and there are systematic changes, with one coming from the auto industry. China plans to eventually phase out gas-powered vehicles. In our special series, Beyond the Wall, CGTN correspondent Han Bin visits two Chinese car makers. They are preparing for the day when the ban goes into effect, with a green alternative of electric cars, or EVs.