Why is ExpressVPN not working in China?

ExpressVPN might not be working in China due to the country's advanced censorship system commonly referred to as the "Great Firewall." The Chinese government employs deep packet inspection (DPI), IP blocking, URL filtering, and bandwidth throttling to control internet access and block access to various international services, including many VPNs. Despite ExpressVPN's efforts to provide service through obfuscated servers designed to bypass VPN blocking, the Great Firewall is continually updated to detect and shut down these services. Consequently, users in China might experience difficulties in accessing VPN services such as ExpressVPN due to the adaptive nature of the censorship technology that aggressively targets and blocks unauthorized VPN traffic.