The company holds secondary-level contracting qualifications in both environmental protection engineering and mechanical and electrical installation, enabling it to execute complex projects with strict compliance and professional competence. Its long-term R&D efforts focus on critical areas such as municipal infrastructure, energy production, industrial pure water systems, resource recovery and utilization, seawater desalination, and industrial wastewater treatment. Through persistent innovation, Tongjie has been awarded multiple invention patents, national utility model patents, software copyrights, and has achieved ISO9001 quality management system and ISO14001 environmental management system certifications—demonstrating its dedication to internationally recognized standards.
