SD-VPN (Software-Defined Virtual Private Network) service​​ leverages China Telecom's metropolitan area network and cloud infrastructure to establish dedicated data transmission channels for customers. It provides IP VPN private networking services for connectivity between internal branches, as well as between customers and their partners, while also offering internet access capabilities. By adopting an "All-Optical Network + SDN" architecture, we deliver next-generation networking services featuring "zero-touch deployment, intelligent self-healing, and on-demand service provisioning," establishing it as the digital transformation "network cornerstone" for chain retail, education, and government/enterprise clients, with a user base reaching 70,000.