It won't be a lie to say that Mark's attitude irked Emperor Qin very much. He was the ruler of an empire that is far more prosperous and stronger than the Phoenix Empire.
How dare a weapon seller born in a commoner family try to cause trouble in the imperial palace and even talk to him like they were equal?
Is it because of the Supreme Being by his side? So what if it is? Qin Mo not only had authority but he also possessed strength.
Sure, Supreme Beings (peak-9-circle) stood at the top of human society but that doesn't mean they can defeat multiple Supreme realm experts (9-circle). The only reason they were feared by even the experts of the same realm is because of the factor known as a breakthrough.
Once a Supreme Being makes a lucky breakthrough to the next realm and becomes a demigod, their strength would increase so much that if they want to destroy an empire, any number of supreme realm experts couldn't save it.