deb http://www.anheng.com.cn/debian/ squeeze main
deb-src http://www.anheng.com.cn/debian/ squeeze main
deb http://security.debian.org/ squeeze/updates main
deb-src http://security.debian.org/ squeeze/updates main
# squeeze-updates, previously known as 'volatile'
deb http://www.anheng.com.cn/debian/ squeeze-updates main
deb-src http://www.anheng.com.cn/debian/ squeeze-updates main
deb http://download.virtualbox.org/virtualbox/debian squeeze contrib non-free