Introduction ; CSR Ziyang locomotive Works, originally known as Ziyang Diesel Locomotive Works, was established in 1966 and put into production in 1973. Then the Railway Ministry carried out large-scale technical reconstruction in the enterprises during the middle of 1980s, and the" Ninth Five-Year Plan” period successively. The enterprise lies in Ziyang, More than 80 kilometers away from Chengdu of Sichuan Province. With advanced machining equipment and strong machining capability in the domestic railway industry, more than 4000 various kinds of mechanical and power equipment, fixed assets initial value of RMB800 million and ten thousand employees, among whom there are all kinds of professional and technical personnel 2800s, the enterprise has the technical equipment and capability advantages in manufacturing locomotive, high-power diesel engine and key spare parts from heat treatment to cold treatment, has whole-set equipment capability and technical capability in manufacturing heavy forging ,which not only can meet the demands of railway, but also could offer high-quality and high-accuracy forging products for domestic and international markets such as automobile and shipbuilding. After more than 30 years development and construction, the enterprise has already become the national railway specialiyed manufacturer of high-power main line diesel locomotive for passenger and freight transportation, various kinds of shunting locomotive and electric locomotive. Main products of the works are involved in DF4 series, DF8B, DF8BJ, SS3, SS3B and all kinds of main line diesel locomotive, electric locomotive, diesel shunting locomotive with different power grade. The Annual production can be up to over 300 units of locomotive. The enterprise owns the perfect after-sale service system. In North China, the Northeast, the Northwest, East China, Central Plains and other places, the works has set up the after-sale service centers, which could offer in-time and high-quality service for clients. The enterprise passed through ISO9001-2000 quality system certification and ISO14000/OHSMS18000 certification successively.