The CentOS image was officially applied and tested by Alibaba Cloud.The CentOS Linux distribution is a stable, predictable, manageable and reproducible platform derived from the sources of Red Hat Enterprise Linux (RHEL). CentOS conforms fully with the upstream vendor's redistribution policy and aims to be 100% functionally compatible with RHEL (CentOS mainly changes packages to remove upstream vendor branding and artwork). CentOS Linux is no-cost and free to redistribute.
CentOS-6.5 was released on Feb 26th, 2014. It contains a lot of bugfixes, updates and new functionality. Packages that have been modified by CentOS include abrt, anaconda, dhcp, esc, fake-provides, firefox, gnome-applets, gnome-desktop, httpd, initscripts, kabi-whitelists, redhat-bookmarts, report, sos, thunderbird, etc.
We recommend reviewing the CentOS on wiki page at https://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.5 for more details.