Jiangnan Yin Jian, a military enterprise, Jiangnan Machinery Co., Ltd., China Ordnance Industry Group, has more than 5,000 employees and more than 2,000 professional and technical personnel. 6000 sets of equipment, including vertical and horizontal conversion machining centers, powerful spinning machines and other advanced equipment 100 sets introduced from Germany, Japan and other countries. The company passed the ISO9000 quality system certification on 1996 1 month, and became a national first-class metrological physical and chemical unit. In 2005, it became a nationally recognized enterprise technology center. With decades of military technology such as steel pipe spinning, winding and curing, it provides sufficient technical support for the design and production of CNG cylinders. There are more than ten years' experience in producing liquefied petroleum gas cylinders, with reliable quality, high market share and products in short supply. Complete sets of equipment for vehicle CNG, liquefied petroleum gas cylinders, natural gas storage and transportation tank cars, gas filling station engineering construction, vehicle gas bags, high-pressure gas cylinder groups for stations and CNG gas cylinder detection lines.