For OpenWrt >= 21.02
sudo apt-get install git git-core curl rsync
sudo apt-get install build-essential gawk gcc-multilib flex git gettext libncurses5-dev libssl-dev
sudo apt-get install python3-distutils rsync unzip zlib1g-dev
git clone https://github.com/openwrt-xiaomi/builder -b v23 openwrt-v23
cd openwrt-v23
./xcreate.sh -v xq-23.05.0
cd xq-23.05.0
./xupdate.sh -f
./xmake.sh -f -t r3d