mv /etc/apt/sources.list /etc/apt/sources.list.bak &&
echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib" >/etc/apt/sources.list &&
echo "deb http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list &&
echo "deb-src http://mirrors.163.com/debian/ jessie main non-free contrib" >>/etc/apt/sources.list &&
echo "deb-src http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list