Depending on the operating system or device you're using, you have different connection methods and VPN protocols available. Please check How to use page to instructions, which are sorted by VPN Protocol (OpenVPN/L2TP, and SoftEther).
Basically, it does not matter which you choose, as trying all protocols is a good idea to get the most stable connection, more speed, bypass restrictions, etc.

We highly recommend SoftEther to get stable, secured and speed connections.

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