Fix the network problem, not just the VPN app.
A hotel captive portal, campus firewall, or locked-down work laptop can make a working VPN look broken. These guides cover the common China network situations.
Use-case guides
Pick the network situation you are dealing with now.
Hotel Wi-Fi in China
Captive portals, room-number logins, auto-connect problems, and when to start the VPN.
University Wi-Fi in China
Campus DPI, dorm networks, student devices, and setup paths that survive blocked app stores.
Business trips to China
Corporate laptops, hotel networks, trade fairs, and fast setup when you cannot waste a day.
City guides
Beijing, Shanghai, Shenzhen, Guangzhou, and Chengdu network notes.
Related setup
Once the network issue is clear, use the matching device guide.