编译的R21.9.18，opkg update发现腾讯源失效了，请问有新地址吗？

[firsthym]

使用的版本

root@OpenWrt:~# cat /etc/*release
DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='SNAPSHOT'
DISTRIB_TARGET='rockchip/armv8'
DISTRIB_ARCH='aarch64_generic'
DISTRIB_TAINTS='no-all override'
DISTRIB_REVISION='R21.9.18'
DISTRIB_DESCRIPTION='OpenWrt '
NAME="OpenWrt"
VERSION="SNAPSHOT"
ID="openwrt"
ID_LIKE="lede openwrt"
PRETTY_NAME="OpenWrt SNAPSHOT"
VERSION_ID="snapshot"
HOME_URL="https://openwrt.org/"
BUG_URL="https://bugs.openwrt.org/"
SUPPORT_URL="https://forum.openwrt.org/"
BUILD_ID="r3761-b31e3e559"
OPENWRT_BOARD="rockchip/armv8"
OPENWRT_ARCH="aarch64_generic"
OPENWRT_TAINTS="no-all override"
OPENWRT_DEVICE_MANUFACTURER="OpenWrt"
OPENWRT_DEVICE_MANUFACTURER_URL="https://openwrt.org/"
OPENWRT_DEVICE_PRODUCT="Generic"
OPENWRT_DEVICE_REVISION="v0"
OPENWRT_RELEASE="OpenWrt SNAPSHOT r3761-b31e3e559"

升级源获取失败

root@OpenWrt:~# opkg update
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/targets/rockchip/armv8/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_core
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/targets/rockchip/armv8/packages/Packages.sig
Signature check passed.
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/base/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_base
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/base/Packages.sig
Signature check passed.
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/kenzo/Packages.gz
*** Failed to download the package list from https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/kenzo/Packages.gz

Downloading https://mirrors.cloud.tencent.com/lede/releases/18.06.9/packages/aarch64_generic/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_luci
Downloading https://mirrors.cloud.tencent.com/lede/releases/18.06.9/packages/aarch64_generic/luci/Packages.sig
Signature check failed.
Remove wrong Signature file.
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_packages
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/packages/Packages.sig
Signature check passed.
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/routing/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_routing
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/routing/Packages.sig
Signature check passed.
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/small/Packages.gz
*** Failed to download the package list from https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/small/Packages.gz

Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/telephony/Packages.gz
Updated list of available packages in /var/opkg-lists/openwrt_telephony
Downloading https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/telephony/Packages.sig
Signature check passed.
Collected errors:
 * opkg_download: Failed to download https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/kenzo/Packages.gz, wget returned 8.
 * opkg_download: Failed to download https://mirrors.cloud.tencent.com/lede/snapshots/packages/aarch64_generic/small/Packages.gz, wget returned 8.