Neither of those work very well in China, in part because by promoting themselves so aggressively (e.g. Nord sponsors lots of vloggers that piss off Beijing and exp used to brag about being "the best VPN for China"), they've made themselves targets. The net nannies can easily cripple any individual commercial VPN if they make doing so an objective.

Ast, by contrast, has done an excellent job of maintaining a low profile while simultaneously staying one step ahead technologically.

Tmk, none of them are legal to use in China, but everyone I know (including government employees) has a working solution of some sort.

There is a procedure you can use to legally install a VPN in your office, if your business scope requires such. That's a lot of red tape and it isn't especially relevant to the scope of this thread (i.e. I don't watch Netflix in my office, and if I did, I'd still want access to higher end severs than my company leases).