At one point in time, the world's most important green technologies were held captive by monopolists. That story was rewritten by Changsu. Through breaking down technological "barriers," we introduced lithium-ion battery films that liberated the country from dependence on foreign suppliers. Rather than merely creating a product, we developed a domestic replacement that made batteries stronger, safer, and denser. Whether you're behind the wheel of an electric vehicle parked in your driveway or if the energy storage systems supporting your city, our innovations are the unseen forces that are propelling the world toward a future that is both sustainable and fully electrified.