ProtonVPN Free review
Fast, free and unlimited bandwidth – where's the catch?
These guys are actually offering a free public VPN service (see the review), but if you can afford the few dollars a month for your privacy then consider their paid tiers which include servers in HK and help subsidize the free service tier. Even when connecting to or from overseas it's good to have a local hop.
All companies should operate their own secure networks almost by definition, especially in an interesting place like Hong Kong, but it's not very hard for somewhat tech-savvy individuals to roll their own for personal or family use either.
There are loads of packages and services built around OpenVPN that are fairly easy to get up and running, but over the next year the adoption of a new protocol called Wireguard can be expected to make things easier and more efficient yet, enabling even more DIY solutions.
I would rather not install any app that I don't trust implicitly on my main mobile phone or any other devices to that matter. Using a VPN with PRC-based ownership operating under CCP's rules and attitude towards privacy? Not something I would recommend to a friend.