Two DeNOx units of MaSteel of BaoWu Steel Group were commissioned by ACRE recently. The DeNOx unit for 5# coke oven batteries was commissioned on December 10th, 2020, and new technology of ceramic fiber filter was applied. The one for 8# coke oven batteries is commissioned in November, and the technology of activated carbon regeneration is applied. Both of the DeNOx are working well and meet the strict standard (NOx<150mg/m3、SO2 <30mg/m3). ACRE executed these two projects in the mode of E+M (engineering and project management). The successful commissioning proves ACRE has the world leading environment protection technologies.