According to the official website of the China Iron and Steel Industry Association, since August 2020, the association has carried out publicity work on the progress of ultra-low emission transformation and evaluation monitoring of steel enterprises. As of May 9, 2023, 82 steel companies have completed the announcement of ultra-low emission transformation on the website of the China Steel Association. As of now, a total of 15 enterprises in Tangshan have completed the announcement of China Steel Association's ultra-low emission transformation, accounting for 18% of the 82 enterprises in the country that have completed the announcement of ultra-low emission transformation.