The company's predecessor is Jiangsu Changdian Technology Co., Ltd. (600584), which is a separate device department. Established in 1972, changdian technology was successfully listed on the main board of Shanghai stock exchange in 2003. As a world-renowned integrated circuit packaging and testing enterprise, Changdian Technology provides global packaging design, product development and certification, as well as a full set of professional production services from chip testing and packaging to finished product testing and shipping. It also has a national engineering laboratory for high-density integrated circuits, a national enterprise technology center and a postdoctoral research center.