qrepolist:
deb http://q4os.org/q4repo q4os-4-0-cn main
deb http://q4os.org/qtderepo bullseye basic main
deb http://ftp.debian.org/debian/ bullseye main contrib non-free
deb http://security.debian.org/debian-security/ bullseye-security main contrib non-free
deb http://ftp.debian.org/debian/ bullseye-updates main contrib non-free
