It's nice to be back in the land of working internet, where you don't have to choose between how you're connected and what services you want to access. The blocks on Google and Facebook services were particularly annoying. If you're going to China I suggest not bothering with wifi and VPNs. The wifi was typically very blocked and the VPN never worked for long. Assuming your phone supports a second SIM (either eSIM or card), get one that supports roaming in China with a few GB per day. I got mine from trip.com but there are others. Set that up as your primary data connection - that way you get to keep your normal number and get the best roaming internet access. I note that the vital Chinese services like Alipay and WeChat work fine with an NZ phone number.