Wang Lu had been undefeated since his debut, except when he lost several times in practice against Liu Li on the mountain. But since he achieved Jindan Stage, he actually didn't completely dominate Liu Li in a fight. His chance of winning was nothing more than around forty to sixty percent. As for against his Senior Sister Zhu Shiyao who was even stronger, that was needless to say. Although the two rarely fought each other, Wang Lu had to admit that his chance of winning was at most only fifty percent, far from being dominant. Of course, compared to the past where he didn't even have a chance at all, his situation now was a lot better.
However, in terms of lower limit of moral integrity, except for his Master, no one was his match. Since Zhou Mumu started it herself, then she shouldn't blame him for his retort.