ISO45001 occupational health certification certificate
Work safety license
Construction labor qualification
AAA credit rating certificate
Yixing Environmental Protection Product Production Qualification Certificate
Operation service certificate for urban centralized sewage treatment facilities
Class II General Contracting for Municipal Engineering, Class II Contracting for Electronic and Intelligent Engineering, Class II Contracting for Mechanical and Electrical Installation, Class I Specialized Contracting for Environmental Protection Engineering
Engineering Design Qualification Certificate
Operating Service Certificate for Industrial Wastewater Treatment Facilities
