If the corporate VPNs keep logs and allow government access, they will be allowed. That’s how it works in some (authoritarian) countries.

I believe China does statistical analysis to do stuff like detecting and blocking VPNs, suspicious looking ssh traffic, etc from home Internet connections not going to an approved business. It’s my understanding it’s very hard to get around the GFW at the moment, and pretty complex stuff is needed to mask VPN traffic to make it look normal (Project X, Xray, Reality, etc).