The OpenWRT router Version 18.06 (This is the one I tested this on. Other versions should probably work as well) WHY EXCEL? It provides an easy, interactive IDE.
The Latest And Greatest Of The ExpressVPN Router App Feb 15, 2020 GitHub - githubrobbi/OpenVPN-config-converter-OpenWRT The OpenWRT router Version 18.06 (This is the one I tested this on. Other versions should probably work as well) WHY EXCEL? It provides an easy, interactive IDE.
OpenWrt repositories are blocked in China as well. So complete these steps in your home country before you fly to China. (If you are already in China, you can install the ExpressVPN client on your laptop, and share that VPN Connection with your OpenWrt Router.
How to Setup OpenVPN on TP-Link Routers (Windows) | TP-Link OpenVPN is a free VPN (virtual private network) service that allows you to remotely access your Home network from anywhere with an open internet service. OpenWrt Forum Archive Jan 02, 2017
Best VPNs for OpenWRT to Secure Your Devices
Jan 02, 2017 Bitlord Expressvpn 😱GhostPathPros+ Jul 23, 2020 ExpressVPN Router Review | What to know & setup an Dec 13, 2018