deb http://mirrors.cloud.tencent.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ xenial-updates main restricted universe multiverse
#deb http://mirrors.cloud.tencent.com/ubuntu/ xenial-proposed main restricted universe multiverse
#deb http://mirrors.cloud.tencent.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ xenial-updates main restricted universe multiverse
#deb-src http://mirrors.cloud.tencent.com/ubuntu/ xenial-proposed main restricted universe multiverse
#deb-src http://mirrors.cloud.tencent.com/ubuntu/ xenial-backports main restricted universe multiverse