When is Kuailian VPN actually set up? Take the official client from the download page, install it, open it on the system, allow network permission, and sign in. Not finding a one-tap switch in the browser is expected — it is not an extension.
People searching Kuailian VPN often treat the website as the switch. A loading page only means the entry works. The tunnel lives in the client process.
After download, the OS asks for network permission
Windows may show a firewall prompt; Mac uses Privacy & Security. Without permission, the UI opens but traffic stays on the old route. Windows admin: Run as administrator. Mac: Privacy & Security.
Nearby nodes before far ones
If the first connect fails, switch a nearby node, then check the clock. Order: accelerator nodes and the guide.
Where to get the client: VPN download. What it is: what is Kuailian VPN. Need the file? Open Download.