I bought a Raspberry Pi 4 and run pivpn on it. The pivpn works really well but the problem is my family members in China cannot get the app installed on their phones. It's lucky the Android phones can still get the Wireguard apk downloaded and installed. But Wireguard APP has been removed from Apple app store in China. Even they've changed to an Apple ID registered in NZ still cannot get it. What a frustration.