HAIDA DOOR CONTROL, which was established in 1987, the main products include floor spring, door closer and automatic door systems. Now HAIDA is the biggest manufacturer and the first corporation in domestic floor spring field. Huzhou Deguan Gatecontrol Co., Ltd is HAIDA’s major manufacturing center in China. It was located in Zhejiang and it takes only 50 minutes to Shanghai Hongqiao Airport. This factory covers an area of 70,000 square meters, 880 skilled employees, with professional technology titles staff of 68 people. HAIDA has more than 110 CNC machines, and uses three-dimensional design R & D methods, CNC product synthesis, CNC lathe tooling, CNC laser cutting, CNC painting and finishing, CNC laser sculpting, and computerized laboratory testing. HAIDA’s annual production capacity exceeds 4,000,000 sets of floor springs, 1,000,000 sets of door closers, and 20,000 sets of automatic door syestems. They are successfully exported to over 70 countries and regions throughout the world, such as Europe, Southeast Asia, Middle East, and South American. After about thirty years’ development, HAIDA has won many honorable titles, such as “National High-tech Enterprise”, “National Safety quality standardization”, “China Well-known Mark”, “Harmonious Enterprise in Labor Relation”, “Top 10 Hardware Door Control Enterprises in China”, “Credit AAA Enterprise”. Moreover, it take the lead in passing international quality certification such as CE\UL\ANSI GRADE 1\ISO9001.