According to official website, a tractor in Ningbo, Ningbo 704 series tractor is equipped with Dongfeng Yangdong 490 diesel engine. The engine is designed with a four-cylinder four-stroke direct injection structure, with a displacement of 2.54 liters and a maximum output of 49 horsepower. It has the characteristics of strong power, good fuel economy and high reliability, and is suitable for agriculture and construction machinery.

Tractor is a kind of agricultural or engineering machinery, which is usually used for farming, traction and transportation. It is mainly composed of engine, transmission system, steering system, driving system and control system.