Sunkun is engaged in researching, developing and producing high-end hydraulic supports. Now we have ability to manufacture a series of hydraulic supports such as shield hydraulic support, slant hydraulic support, sublevel caving hydraulic support, face-end support, face support and so on, which cover from 0.8m to 6.3m. With durability tests of 50,897 times which is 1.5 times European standard, the ZY8800/17/35 shield hydraulic support has developed an area for 3.5m hydraulic supports designed and manufactured in China with high intensity and reliability. The project has been listed as China Aerospace Science & Industry Corporation 11th Five-year Plan, 2006 Development Programs Transformed from National Defense Scientific and Technological Industry to Civil Projects, 2006 Sichuan Key Technological Transformation Projects, 2006 Chengdu Major Science and Technology Projects and 2006 Chengdu key Industrialization Projects Plan(I).