Changchai Co., Ltd. is a national industrial enterprise with a history of more than 100 years. It is one of the earliest professional manufacturers of internal combustion engines in China. Changchai has produced more than 30 million diesel engines and has been exported to 78 countries and regions. Changchai mainly produces medium and small power diesel engines, with a power range of 1.62-117.6 kW and a total of more than 1000 varieties. The products are widely used in pickup trucks, light trucks, low-speed trucks, tractors, harvesters, gardening machinery, plant protection machinery, high-speed rice trans-planters, generator sets, engineering machinery, cold chain and ships. Changchai has a national enterprise technology center, a postdoctoral scientific research workstation, and Jiangsu small and medium power internal combustion engine engineering technology research center. Using three advanced technical routes recognized by the Ministry of environmental protection, including high-pressure common rail, electronically controlled monomer pump and electronically controlled VE pump, Changchai has successfully launched non road country III, country IV electronically controlled diesel engines and vehicle country V diesel engines in the industry, forming a multi series Multiple models. The application of new technology makes Changchai products more reliable and economical, and can fully meet the requirements of vehicle transportation, harvester, wheel trailer, loader, plant protection machinery and other supporting fields. At the same time, Changchai has many multi cylinder machines in the field of non road machinery, which have passed the emission certification of EPA and EC of the United States, obtained the green pass to enter the European and American markets, and are competitive in the international market. So far, Changchai has nearly 40 provincial and municipal high-tech products, and has obtained 145 patents authorized at home and abroad, including 14 invention patents. "Changchai" brand diesel engine is a famous brand product in China. The enterprise has passed ISO9001 quality system certification, ISO14001 environmental management system certification and iatf16949 automobile product quality management system certification, and obtained the national export commodity inspection exemption enterprise qualification. Changchai has domestic advanced internal combustion engine manufacturing equipment and technology, and has successively introduced advanced casting, processing, assembly and internal combustion engine testing equipment from the United States, Germany, Switzerland, Japan, Austria and other countries. Changchai has built a nationwide sales service network in China, with 5 sales business units, 27 sales service centers and 799 service stations. It is a senior customs certified enterprise with a perfect diesel engine sales service network system and can provide customers with high-quality, efficient and timely services.