https://github.com/coolsnowwolf/lede
https://op.dllkids.xyz/op/firmware/
https://mirrors.tuna.tsinghua.edu.cn/lede/releases/21.02.0-rc2/packages/arm_cortex-a7_neon-vfpv4/luci/?C=S&O=D
https://openwrt.proxy.ustclug.org/snapshots/targets/ramips/mt7621/packages/

https://archive.openwrt.org/releases/19.07.8/targets/ramips/mt7621/
https://openwrt.org/packages/pkgdata/luci-app-nft-qos
https://downloads.openwrt.org/releases/21.02.0/packages/mipsel_24kc/luci/
https://mirrors.tuna.tsinghua.edu.cn/lede/releases/21.02.1/packages/