Nanjing Konghui Automative Technologies Co., Ltd, founded in 2012, is specialized in all kinds of air springs that are highly durable, precisely engineered and cost-effective for use in a wide variety of actuation and vibration isolation applications. Then let us introduce our factory: Sifang Rolling stock Research institute Co., Ltd（SRI）， subsidiary of China Northern Locomotive & Rolling Stock Industry (Group) Corporation is located in QingDao, a beautiful coastal city. It was created in 1959 with an area of 180, 090 M. Led by its development strategy of “Development of both technical research and industrialization of technology”, SRI is putting its accent on anti – vibration technology ，electric technology, braking technology and coupler technology as well as the manufacturing of the related products. SRI attaches importance to the construction of R&D platform and production platform. It owns complete standards & information management system and testing & inspection system. It has passed the certification of ISO9001, ISO14001 and OHSAS 18001 and got Chinese National Laboratory Certificate and TTCI Laboratory Certificate. Its strong capability of machining, rubber and electronic production ensures the punctual delivery of stable and reliable products to our customers.