Shuangyang Fan a professional manufacturer specialized in fans. dampers and silencers. It covers an area of more than 85,000 square meters and construction area 65,000 square meters with the registered capital 206.2 million yuan and total asset are nearly 400 million yuan. Shaungyang has formed a complete system included the design, manufacture and sales of fans in the fields of civil construction, metro and tunnel, nuclear power station and industrial supporting.