Is there a way to increase the speed of the VPN in China?
There are. In fact, you don't even have to worry about slowing down the Internet when connecting via a VPN if you follow the tips below:
Choose a VPN Service with no bandwidth restrictions.
Always try to connect to the nearest VPN server (if it is located in your country, it is even better).
Make sure that your firewall or antivirus does not interfere with the VPN. Otherwise, just disable the firewall.
Try using a VPN Protocol with less powerful encryption (such as PPTP) if you really need to increase the speed.
WARNING: this Should only be done if you are fully confident that your data will be completely secure, since PPTP is not considered a secure Protocol. If you can't afford to take risks, use L2TP/IPSec or SoftEther.
Play with the VPN Protocol settings. For example, use OpenVPN UDP instead of OpenVPN TCP, since it works faster.
Pause or turn off apps or devices that use your router but you don't need them right now (for example, a smart kettle).
If possible, use a wired connection instead of a wireless one. Most likely, this way you will be able to increase the speed of the VPN, because there will be less competition for bandwidth.Try restarting your modem or router. Sometimes a full cache can slow down the Internet, and restarting the router helps to fix this problem.
Also, if you are running a VPN on your router, try using a VPN directly on your device (if possible, of course). You can also try restarting all devices to determine whether their performance affects the speed of the VPN.
Also, if you notice a significant drop in speed when downloading, you might want to try switching the server