TZ was founded in 1998. It is located in Beichen Science and Technology Park in Tianjin city of China. The place is superior and the transport is convenient. After 20 years of development and growth, it has formed a group company, which consists of five subsidiary corporations, namely, Tianzhongzhongzhi company, Tianjinzhongzhong company, electric company, hydraulic company and heavy metallurgical company, the group has 400 enployees. Its area is 120000 m2, and has a 72000 m2 plant where people can make and assemble machines modernly. It also has a 9000m2 general office building. It has passed ISO9001: 2015 quality system, and is awarded_'enterprise technology enter'.

Metallurgical machinery equipment is the main product of the company which has the ability of researching\designing and making whole set of machinery\electric and hydraulic. Its products sell well, and are high quality and inexpensive. Its products are: Hot rolled bar and wire line\hot rolled strip and plate line\and hot rolled section steel line.

TZ is equipped with more than 300 large-scale CNC milling and boring machines, including 5 m * 18 m, 4 m * 16 m CNC gantry milling machine, 4-axis vertical machining center, 6.3 m vertical lathe, 3.2 m hobbing machine and other metal cutting machine tools. TZ has 200 t, 100 t, 75 t, 50 t, 32 t bridge cranes, Maximum lifting capacity 400 t, and has become one of the mechanical processing bases with strong comprehensive processing capacity in Tianjin.