Hangzhou Sanxin Network Technology Co., Ltd. ("Sanxin"for short hereafter) is a hi-tech enterprise that has been dedicating in the research, development, production, sales and engineering construction with respect to photoelectric communication technology, radio & TV broadcast engineering and computer network technological products. Sanxin has attracted a handful of experts, professors and senior engineers of rich experiences and established a technical team composing of competent, sedulous and ambitious professionals. Taking Zhejiang University as its technical base, Sanxin has built up cooperative relationship with some oversea hi-tech enterprises, and has paved a solid foundation for the long-term development and the R&D of new products. Sanxin will continuously launch new technological products to meet the increasing market demands. The main products include CATV optical transmitter, optical receiver and digital terminal, with the annual yield reaching more than 5, 000 sets. With strict inspection and curing before leaving factory, all the products can work stably and reliably in the practical operation. In the past years, Sanxin products have been applied by numerous users in broadcasting and network system and have won high appraisal. The optical equipments made by Sanxin have been used in large batches in Zhejiang province, and also marketed to other provinces such as Jiangsu, Fujian, Shandong, Anhui, Henan and Jiangxi. Sanxin has been dedicated all the time in the overall design and construction for CATV networks and comprehensive service networks, from which it has accumulated abundant experiences enabling Sanxin to sufficiently integrate design and construction. The Sanxin solutions features advanced design, excellent network quality, reasonable cost and high overall performance, which have gained unanimous applause from the Broadcasting and TV bureau and the network users. Insisting the tenet of "Quality First, Customer Topmost, Credit Based", Sanxin purports to seek improvement and new growth points commonly with the users by means of supplying quality products and optimum services.