Since 2017, Shougang Group, Jingtang, Cold Rolling Mill, Tongshan Iron & Steel, Changshan Iron & Steel, Shuisteel, Guizhou Iron & Steel and Environmental Corporation and other key polluters have released annual environmental responsibility reports year by year, establishing the image of green development of enterprises.Cleaner production audit and environmental management system construction have been carried out steadily, and the performance of environmental management has been significantly improved.