Installing VPN in China

I’m going to China in a couple days. I live in US and I’ve downloaded ExpressVPN and ProtonVPN. (I’ve seen mixed reviews on Stealth mode for ProtonVPN, I’ll test it out to see if it works). I’m wondering if there’s anyway for me to help a friend in China to get VPN on his device. For reference he has an iPhone. I have a MacBook and an iPhone too. Is there anyway I can pre download VPN and somehow share it with him when I’m in China? To my understanding it’s very difficult to download VPN in China.

Thanks in advance! 🙏