ZYNP Corporation is principally engaged in the research, development, manufacture, distribution and technology services of internal combustion engine cylinder liners. The Company primarily provides dry type cylinder liners, wet type cylinder liners, insertion cylinder liners and air conditioner compressor cylinder liners. The Company's products are applied principally in business automobiles, passenger vehicles, agricultural machinery and industrial machinery, among others. The Company also involves in the provision of after-sale and maintenance services. It distributes its products in domestic and overseas markets.

ZYNP is a public company in the A share market. It was founded in 1958 and becomes one of the three biggest global manufacturers of cylinder liner, is National Large Industrial Enterprises, cylinder liner workgroup leader of Internal Combustion Engine of Standardization Administration of China, is responsible for the establishment and revision of national standard in the cylinder industry, Heyang brand is the China well-known mark. The sale and production of cylinder liner is No.1 in Chinese market for 22 years continuously and No.1 in Asian market for 20 years continuously.
ZYNP owns the global largest OEM market and it is the unique enterprise which R&D and design in step with renowned international companies, such as with Big Three American automakers and Germany Benz. Cooperative partners include the world-class engine manufacturers: Ford, GM, Chrysler, Cummins, Navistar, Germany Benz, Germany Deutz, French PSA, Italian FIAT, Sweden Volvoand so on. ZYNP was awarded the "Excellent Supplier"、"Core Supplier" and "Quality Excellent Prize for Quality" continuously.