随身WIFI刷openwrt后设置软件源

我的随身WIFI刷了ImmortalWrt（openwrt的一个分支），它的软件源downloads.immortalwrt.org被墙了， 需要更换国内源才能安装或者更新软件，目前测试可用的源：

src/gz openwrt_core https://mirrors.tuna.tsinghua.edu.cn/openwrt/releases/21.02.0/targets/rockchip/armv8/packages
src/gz openwrt_base https://mirrors.tuna.tsinghua.edu.cn/openwrt/releases/21.02.0/packages/aarch64_generic/base
src/gz openwrt_luci https://mirrors.tuna.tsinghua.edu.cn/openwrt/releases/21.02.0/packages/aarch64_generic/luci
src/gz openwrt_packages https://mirrors.tuna.tsinghua.edu.cn/openwrt/releases/21.02.0/packages/aarch64_generic/packages
src/gz openwrt_routing https://mirrors.tuna.tsinghua.edu.cn/openwrt/releases/21.02.0/packages/aarch64_generic/routing
src/gz openwrt_telephony https://mirrors.tuna.tsinghua.edu.cn/openwrt/releases/21.02.0/packages/aarch64_generic/telephony