On March 20, 2023, Shandong Province national key monitoring enterprise monitoring information release platform shows that Caoxian ** new building materials limited company Sulfur dioxide in 3.16-3.18 suspected exceeded the emission standards. PECC reflected the situation to the local environmental protection bureau via 12369 and Weibo, as detailed in the following chart:

April 12, 2023 received feedback from the local environmental protection bureau: for the enterprise exceeded the standard behavior has been investigated and verified, has been filed by the Heze City Bureau of Ecology and Environment.