Shanghai Sieyuan Electric Co., Ltd (Sieyuan), the domestic famous manufacturer specialized in electric equipments, which was founded in 1993. Sieyuan develops with the electric industry of China and devotes in providing comprehensive solution and product integrating high-tech methods such as modern information technology, new material etc. with traditional electric for electric industry. Sieyuan has established technical development system with complete independent intellectual property by technical innovation and stable operation, has won numerous patents for invention and lots of national key new product. At present, both Sieyuan’s key product and technology play a leading role in Chinese market.