CYPR was a joint venture co-established in 1995 with total investment of CNY350 million by Yizheng Piston Ring Factory and ASIMCO Technologies Ltd£¨ASIMCO£©. In 1998, CYPR began technological cooperation with NPR of Japan. 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 terms of production and sales volume. 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 26 countries and regions in the world such as US, Japan, Korea, etc.