Due to the new policies in April, many people's VPNs have been struggling on the brink of life and death in recent days, but because of the existence of the "wall-crossing paradox" ( if you can't bypass the firewall, you can't download VPN software ), and once the VPN completely fails, you'll be completely disconnected from the internet. I'll leave everyone a lifesaving tip: Astrill VPN, which is very expensive and very stable, does not support trial use or refunds. This is not an advertisement; it's a last resort to save your life if your internet gets cut off someday.