China Chongqing Big Science and Development Co.Ltd has specializes in manufacturing machineries and vehicles for a long time. Our products have been shipped across the world and enjoy the popularity in all the markets. We have researched and developed CNG (Compressed Natural Gas) two wheels motocycles and exculsively taken on the official patent rights. Besides, with our consistant efforts, we have applied the technology on tricycles. Our products cover motorcycles, ATVs, scooters, off-road, general engine, farm machine,CNG products ,mini moke,mini car,bus Pick up,spare partsand so on.