Yuh Shan Environmental Engineering Co., Ltd. (7715.TWO) provides environmental engineering services in Taiwan, specializing in soil and groundwater pollution remediation, waste removal and treatment, and pollution prevention and control equipment. The company offers environmental engineering technology consulting; soil and groundwater pollution investigation, survey, evaluation, testing, and remediation services; waste management including mechanical biological treatment (MBT) systems for processing municipal solid waste and business waste into refuse-derived fuel (RDF/SRF) or compost; and pollution control equipment such as biological dehydration and sorting systems. It operates primarily in Taiwan, targeting industrial sites, chemical plants, gas stations, farmland, military camps, and waste facilities, with notable achievements in remediating chlorinated pollutants, oil-contaminated sites, and agricultural land. Founded in 1982 and headquartered at No. 80, Minzu 1st Road, 30F-2, Kaohsiung City, Taiwan, the company expanded into waste-to-energy circular economy initiatives in 2018 and relocated to Kaohsiung's Long Valley World Trade Building in 2022, attracting technology transfer from German firm IEG. Recent developments include sustained focus on MBT garbage processing systems and ongoing projects in contaminated site remediation amid a reported net sales revenue decline of 6.51% and total assets decrease of 27.35% in Q2 2025.