Systematic management is important to maintaining high-quality products and services. Guided by international standards, D&A Group installs a full set of management systems, which covers the aspects of quality, environment, occupation health and safety. We strictly follow the relevant procedures, and have been accessed and issued the ISO 9001:2015 Quality Certification, ISO 14001:2015 Environmental Management, and the ISO 45001: Occupational Health and Safety Management Certification.