StealthVPN technology can be added to client software like Perfect-Privacy-VPN, VPNSecure did to bypass DPI or other firewalls of censored country so that VPN traffic is masked and can not be ever traced while making it like a normal internet traffic in the sight of censored country's IT authorities. Proxy.sh, VPN.ac, IPVanish etc have added something like Obfuscate OpenVPN, OpenVPN (XOR) etc technology for the same reason. Add whatever is better for your users especially living in China etc.
We have added the Stealth VPN protocol to our Windows app. You may read more about it here: https://www.ibvpn.com/2018/03/stealth-vpn-the-key-to-online-freedom/