cr8806官方固件备份：
https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/rom/cr8806/miwifi_cr8806_firmware_4622b_6.2.33.bin
https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/rom/cr8806/miwifi_cr8806_firmware_fe70b_6.2.14.bin
小米路由器修复工具:
https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/tools/MIWIFIRepairTool.x86.zip
注意：去掉（.zip）后缀后使用
miwifi_cr8806_firmware_4622b_6.2.33.bin.zip
miwifi_cr8806_firmware_fe70b_6.2.14.bin.zip
