Yizheng Shuang Huan Piston Ring Co., Ltd (CYPR)was a joint venture co-established in 1995 with total investment of CNY350 million by Jiangsu Yizheng Piston Ring Factory and ASIMCO Technologies Ltd(ASIMCO). In 1998, CYPR began technological cooperation with Nippon Piston Ring Co., Ltd (NPR). The year of 2003 witnessed great success achieved by CYPR of more than CNY300 million sales revenue.

Currently with piston ring annual production capacity of 150million pcs, products variety of more than 1800 kinds, CYPR has been entitled as the biggest specialized piston ring production enterprise and has ranked the no 1 for consecutive years in the same industry nationally in terms of production and sales volume.

Piston ring of "CYPR" brand have been applied in various areas ranging from sedan, mini vehicle, motorcycle, wagons of heavy, medium and light duty and construction, combustion engine, air compressor, refrigeration, brake pump, agriculture diesel engine and transportations. "CYPR" piston rings have accounted for more than 25% national market share, and the diesel engine piston rings have taken over 70% national market share covering more than 80% cities in China. CYPR has been regular supplier for near 90% national OEMs and taken a leading role in China in the same trade in terms of export volume with products being sold to more than 23 countries and regions in the world such as US, Japan, Seoul, etc.