CUHK VPN allows CUHK users to securely connect to the campus network even over a non-CUHK network access (e.g. home broadband service). The VPN technology encrypts the data transferred online and prevents private information from wiretap. Some CUHK websites / online resources are accessible off campus only if users have connected to a VPN connection.
You may experience an unstable VPN connection from mainland China with the gradual upgrade of China’s Great Firewall. Most of the University systems do not require a VPN connection. You can do your email, access eLearning system, browse CUHK websites, etc through any Internet connection. Please check out services that require a VPN connection.