Our company grows out of the national second electric appliance factory which was established in 1937.In july of 1938, we succeeded in producing the first incandescent lamp in chian.From then on, we have devoting to develop electron vacuum devices, such as lighting devices, display devices, photosenstive devices, and so on.Now, HDE has been the r&d centre and production base of electron vacuum devices and electric light source products in China. As a state high-tech enterprise, we always take science and technology as our motivation.HDE is the first manufacturer in china to produce incandescent lamps, fluorescent lamps, b/w picture tubes, color picture tubes, monitor tubes, cathode ray tubes, counter tubes, photomultiplier tubes, infrared tubes and radar indicator tubes. Up to now, we have developed new electronic devices, energy saving electric light sources, electronic appliances, communication products and computers.The total products of company consist of 20 categories with more t