Haoyang Environment Co., Ltd. Passed ISO9001 quality management system, ISO14001 environmental management system, OHSAS18001 occupational health and safety management system certification Possess “Safety Production License” It has qualifications such as “Professional Contracting Level 2 for Waterproof, Anti-corrosion and Insulation Engineering”, “Professional Contracting Level 2 for Environmental Protection Engineering”, “General Contracting Level 3 for Municipal Public Works”, and “Professional Contracting for Special Professional Engineering”.