Dongguan Chengzhang Electronics Factory established in 2000 and located in Dongguan, Guangdong, which combines the design, development and selling in various switches and jacks. We have two branches that located in Chashan, Dongguan and Hengyang, Hunan. The former is called Dongguan Chengzhang Electronics Factory that has more than 150 employees consist of technicians and managers respectively 20 and 10 and we have 2 set of grinding machine, 6 sets of metal punch equipment, 2 sets of milling machine, 2 sets of cutter, 3 sets of drilling machine, 70 sets of stepping punch equipment, 50 sets of test machine and 20 sets of manual punch equipment while the later is called Hengnan Xiangshi Metal Electronics Factory that has more than 200 employees consist of technicians and managers respectively 25 and has 30 sets of manual punch equipment and 80 sets of stepping punch equipment.