Xiaomi Mi WiFi Router 3G [1] looks very similar to Xiaomi Mi Router 4A Gigabit Edition [2]
Would they share the same procedure to install openwrt? [3]
[1] https://www.aliexpress.com/item/32923946559.html
[2] https://www.aliexpress.com/item/33001460205.html
[3] https://openwrt.org/toh/xiaomi/mir3g#installation