Qingdao Shuanghu Group established in 1968, formerly as Rubber Group the 3rd Rubber Factory, is one of the earliest enterprises that manufacture rubber products and rubber conveyor belts, and is the first and the largest vendor of dip-angle belt with corrugated flanges in China.

With the tenet "Innovation, credit, elaboration", and the spirit of improvement and pragmatics, the company never cease developing and innovating. Through recent ten years development, now the company has been a comprehensive company integrating rubber production and mechanical processing. It also passed ISO 9002 quality system.