On August 11, 2021, Shandong Province key monitoring enterprises self-monitoring information public platform shows that particulate matter from 1 cupola gas of Shandong xxx Machinery Co. was suspected to exceed the emission standard on July 28, 2021 and July 29, 2021. PECC reflected the situation to the local environmental protection bureau via 12369 and Weibo, as detailed in the chart below:

September 30, 2021 received Yantai City Ecological Environment Bureau Longkou Branch of the Letters and Visits Section specific reply: for the enterprise exceeded the standard behavior, has been filed for investigation and strengthen the environmental supervision.