On October 26, 2023, on the Inner Mongolia Autonomous Region Pollution Source Monitoring Data Management and Information Sharing Platform, it was shown that the chimney of Yakeshi **Public Utility Management Company Limited, Ulqihan Branch, was suspected of exceeding the standard for nitrogen oxides 10/4-10/6 emissions. PECC reflected the situation to the local environmental protection bureau through 12369 and Weibo, as detailed in the following chart:

December 4, 2023 received feedback from the local Environmental Protection Bureau: verified on-site, the problem of excessive emissions is true, and ordered to require key heating enterprises to strengthen daily management.