Recently, Yingli group through the introduction foreign advanced technology and production equipment, and to absorb and improvement, through upgrading the process, equipment and innovation, make the quality of the products gradually develop to the direction of high performance, high precision, environmental protection and energy saving, and make the product quality close to the international level, the production process is also close to the world's advanced level of technology, lay Yingli Group's leading position in the peer of Qingdao fittings industry.