China sinotruk international co ltd. mainly researches, develops, produces and sells various kinds of heavy-duty trucks, special trucks, special-purpose vehicles, as well as engine, transmissions, axles and other assemblies and automotive parts, and owns a full range of commercial vehicle brands such as Yellow River, Sitrak, Howo, etc., which is one of the heavy truck enterprises with the most complete coverage of drive forms and power in China's heavy-duty truck industry.