The moment Lan Ju spoke, all the arguments were shut down and the matter is settled.
Perhaps, it is because of his powerful cultivation, or perhaps, it is because Lan Ju had admitted that he is a servant of Mark, not his backing. Or it might even be because Qin Mo wanted to get back at Mark for giving more respect to Yang Bingwen.
Whatever the case, Emperor Qin had agreed to witness the demonstration of the weapon that Mark intended to sell to the imperial family.
However, Mark wasn't happy. He felt the same that Qin Mo earlier felt.
After killing immortal realm beasts in the trial, Mark was under the impression that he is more powerful than the zheng even in its peak state.
With Lan Ju's loyalty crossed 50% and behaving really like a loyal servant lately, Mark was already feeling superior to the zheng and that is why he didn't like the sudden change in the behavior of the emperor.