That phone is not on the list:
The list of models that are confirmed to receive Android 6.0 in China are as follows: Huawei P8, Mate 7, Mate S, P8 youth edition, P8 Max, Maimang 4 (domestic variant of G8), G7 Plus and G7. In the honor series, Honor 7,7i, 6 Plus, 6, X2, 4X, and Play 4C will be upgraded to Android 6.0.
On the other hand, that’s for China.
The 4G Ascend Mate2 was — and still is — being sold as an international phone.
Which is why my post title has a question mark.