Weichai natural gas engines include WP4.1NG、WP5NG、WP7NG、WP10NG、WP12NG、WP13NG (Product line up from 74kW to 480kW)，which meet the requirements of China state five emission, and China state six emission.They are widely used in a lot of industry areas such as 6-18m bus, Various trucks, engineering machinery, special vehicles,ship power,and other industries, with high reliability,strong power, energy saving and environmental protection.