Beijing Yifeng letter industry technology development Co Ltd   

Beijing Yu Feng information technology company is a with a high technology content products enterprise, specializing in intelligent management, monitoring project design and implementation, monitoring equipment sales, alarming, monitoring and controlling systems, access control systems, perimeter alarm, broadband access and integrated wiring products and engineering services company has a strong technical team and in engineering practice for many years, has accumulated rich experience. To improve the management system to ensure the safety of products and projects, perfect, reliable. More to provide quality of service and technical support. Phone 010-64772852 Fax: 010-64754731...