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Guoyan Building Technology co.,Ltd persist in “Leading Service, advancing technique, quality first, clients supremacy” as company’s philosophy, committed to ensure the interest of our clients and the aftersales quality of the projects. The company advocate mutual development and create wealth together with our clients. We have provide services for more than 400 projects with total construction area of more than 29 million square meters in the field of green building and building energy saving since the establishment of the company, provide effective, efficient, worthy and authoritative advisory service.