Jiangsu Yizheng Internal-combustion Engine components Co., Ltd, one of the largest manufactories specialized in designing and manufacturing piston ring in China, Located at Yizheng Economy Developing Area, near Yangtse Rive, in the middle of Nanjing and Yangzhou, have the convenient logistics transportation . There is more than 60,000 square meters, the floor area is more than 40,000m. 1000 employees, total 150 engineers and technician, have fixed assets worth RMB 80 million , 400 machining machines, 400 inspections and measurement equipments, the annual turnout of piston ring is more than 60,000,000 pieces, the annual turnout of valve seats is 10,000,000pcs, and the annual turnout of spiral spring is 40,000,000pcs. Yizheng has been the regular supplier of more than 60 engine manufacturers which already specified piston ring with Yizheng logo, Yizheng product has already been popular in the market of diesel, automotive vehicle, motorcycle, light-duty vehicle, air-compressor and so on., Yizheng products have been sold to the oversea market such as Europe, Africa and south east Asia During the passed years, Yizheng has been continuing to enhance the competitive ability in home and abroad market by adoption of international advanced modern-venture management, importation of international advanced hi-technology and importation of inspection equipment. At present, to satisfy fast-change market"s requirement, Yizheng integrate manufacturing ability with researching and developing ability. Yizheng have gained greatly successes in the market with continual innovation, strong enterprise and unique management concept, been entitled as Jiangsu Star Enterprise, Jiangsu High Technology Enterprise and AAA Credit Status Enterprise and so on, had been awarded