On January 16, 2023, Shandong Province national key monitoring enterprise monitoring information release platform shows that ** Environmental Protection (**) Wastewater Treatment Co. Ammonia nitrogen, COD in 1.14-1.15 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:

February 8, 2023 received feedback from the local Environmental Protection Bureau: for the company's discharge of pollutants automatic monitoring data ammonia nitrogen appeared to exceed the standard in a timely manner to start exceeding the emergency response, to carry out traceability investigation, and the exceedance of the case filed for investigation.