[CentOS] Does Huawei break the license of CentOS?

Hello, CentOS team and everyone who cares about CentOS,

Huawei release an Euler OS, which is an distribution based on CentOS.
http://developer.huawei.com/ict/en/site-euleros/euleros-introduction

According to CentOS's statement, CentOS is distributed under the GPLv2 License.
http://mirror.centos.org/centos/7.4.1708/os/x86_64/EULA

The GPL license requires the modified version to be open-source AND
release in the GPL license, as well.

However, Huawei break the GPL license by close-source and replace the
license with their proprietary one.

How do I find it? Well, I download the so-called Euler OS from
http://developer.huawei.com/ict/site-euleros/euleros/repo/yum/2.2/os/x86_64/iso/20170930/

And install it in the virtual machine. From the following path:
/usr/share/euleros-release/EULA
/usr/share/eula/eula/eula.en_US
I find that it is NOT the GPL license, but Huawei's own license.

So is Huawei breaking the license of CentOS?