Device name: r4s
Firmware download: https://downloads.openwrt.org/snapshots/targets/rockchip/armv8/openwrt-rockchip-armv8-friendlyarm_nanopi-r4s-ext4-sysupgrade.img.gz
Problem description: Using iperf3 -c wwwqq.cc.cc to test the uplink speed is only 1-3Mbps, but using https://github.com/DHDAXCW/NanoPi-R4S/releases can run the full bandwidth.