January 5, 2024, in Shandong Province, key monitoring enterprises self-monitoring information public platform shows that Dongying ** Environmental Protection Technology Co. 12/16, 12/29, 12/30 suspected excessive emissions of nitrogen oxides. PECC reflected the situation to the local environmental protection bureau through 12369 and Weibo, as detailed in the following chart:

Feedback received from the local environmental protection bureau on February 2, 2024: It was verified that the exceedance of the standard was true, and the law enforcement officers filed a case to investigate the violation of the enterprise.