Ningbo Songying Auto Air-Conditioner Parts Co., Ltd. is a member enterprise of Automotive Air Conditioner Working Committee of China Refrigeration Industry Association. It is a professional manufacturer of "SONGYING" brand thermostat expansion valve whose products have been tested and appraised by the state authority organ. The company has also been approved by ISO9002 authentication.

The American, Japanese and international technical standards for automotive air conditioners are currently applied by the company to control quality of expansion valves for diversified vehicles. It is the only appointed supplier of domestic automobile manufacturers. With steady and reliable quality, the products are well marketed in U. S., southeastern Asian countries, and west European countries.

Songying, embracing the world and known to the world, is bound to be reputed across the national boundaries.