The "Pentium I" backbone network built and operated by CITIC Network is a telecom-grade high-speed broadband communication network built with world-leading IP/DWDM technology. The length of the optical cable route is 32,000 kilometers, covering 167 key prefecture-level cities nationwide and reaching all provincial capitals except Lhasa, Tibet. At present, 2 1 backbone nodes have been opened in large and medium-sized cities. "Pentium I" network can carry a variety of basic telecommunications services and value-added services, including voice, data and video. At present, it mainly provides telecom-level comprehensive services such as cross-regional long-distance networking, high-speed Internet private line access, MPLS-VPN and IDC for telecom operators, governments, financial enterprises and multinational groups at all levels.