Chengdu railway bureau is one of the railway bureaus under the ministry of railways, with an operating mileage of more than 5,000 kilometers. It has fixed assets of 56.038 billion yuan. Since 2005, feihe has provided more than 40 air compressors to chengdu railway bureau. Stable and reliable products have injected strong power into the construction and development of chengdu railway bureau and made positive contributions to the great development of China's railway.