OpenWRT support to Xiaomi Mi Router 4 Pro : r/openwrt
OpenWrt for Xiaomi Mi Router 4C - Community Builds, Projects & Packages - OpenWrt Forum
Enterprise Servers and Networking: Step-by-Step: Install OpenWRT on the Xiaomi Wifi Mini router from a Windows Computer (2018 edition)
OpenWRT - Xiaomi Mi Router 4 OpenWRT Installation - YouTube
Tutorial #15: Xiaomi Mi Router AC2100 to OpenWRT - Domoticaencasa.es - YouTube
Xiaomi Mi Router 4A Gigabit Edition (R4AG/R4A Gigabit) -- fully supported and flashable with OpenWRTInvasion - #302 by Double-G - For Developers - OpenWrt Forum