It's a good VPN for China Mainland. These days even ExpressVPN is not working in China Mainland, but this is working well. I recommend this one if you're in China. But not sure for encrypting options.

In China every year there are often so many days most of the vpn will fail. But the basics of Astrill are stable. In the third year i bought their wireless router, giving my home an extra full-speed wall-turning signal. I wish the price could be more favorable. Astrill's website itself needs to be turned over the wall to get up a little bit uncomfortable. But their performance on all platforms such as mac IOS win makes users comfortable.

I'm a genuine customer about to renew for the 7th year - I have no issues with it. I get 3/4 of my 1Gbps speed and it stays connected for weeks at a time using a MAC. You get what you pay for and I am happy with that. I contacted support earlier today and got a reply by e-mail within minutes. I like the fact they scramble your data and I can remove any connection logs on demand. I also like they way they have an office in a tiny little place in the Indian Ocean - makes it extra easy to not keep logs. I'll be renewing on Black Friday but for now I am taking a year at full cost. For reference I am in the UK and I don't need a VPN but I use this on my mobile and laptop and it gives me security when using Hotel and public WiFi.