Muhammad, fantastic paint work, and a very nice dio.
I agree with Frank's comments about the ground.
You made a very detailed work in the interior of the HQ, but at the same time it is dificut to see (mosttly because of how deep the construction is). I'd suggest, for the next dio (in this one it would be too difficult to do), to put the edge of the dio, exactly at the end of the HQ and without this wall, so from this angle the HQ is completely open and with more light to see all this fantastic work inside,and the composition of the scene dosenīt change at all, at least in my opinion.
Regardless all this, a great dio. Congratulations!!!