[The Institute of Public and Environmental Affairs]...identified 175 companies listed on the Hong Kong Exchanges and Clearing Limited3 (HKEx) with environmental infraction records in the mainland...[Sixteen] percent of companies listed on the main board of HKEx have publicly available records of violations in their mainland operations...[T]he total number of environmental violations by these 175 companies exceeds 750, revealing that many are repeat offenders...[refers to Kingboard Chemicals Holdings, Kingboard Laminates Holdings, United Laboratories International Holdings, KO YO Ecological Agrotech Group, Tsingtao Brewery, Zijin Mining Group, Zhuzhou Smelter Group (part of Hunan Nonferrous Metals), China Resources Enterprises, China Resources Power Holdings, Guangxi Huanyin Aluminum (part of Minmetals Resources), PetroChina, Datang International Power Generation, Sinopec Guangzhou Company, China Shenhua Energy, Fountain Set Holdings, DaChan Food (Asia), Tingyi (Caymen Islands) Holding, Want Want China Holdings, Maanshan Iron & Steel]