First of all, in so many chapters of the Water Margin, Zhu Wu didn't have many opportunities to perform. What impressed me the most was that he designed to capture Shi Jin alive and rescue Yang Chun. Secondly, in the war between Liangshan Army and Liao Army, he once proposed a large array that sounded very powerful and turned it into a Peng array, but it turned out to be not practical at all. Not only did it have no effect on the enemy, but it made him lose.
Other Zhu Wu appearances were less noticeable. Although he can see what others are doing in the later battles, it is obvious that he can't crack it at all, so in most cases, he is silent. Moreover, Wu Yong's position in the whole Liangshan is recognized by everyone, and many brothers in Liangshan were provoked by him.
Secondly, after wooing, under his command, before the outbreak of Fang La War, the Liangshan army was on a roll, and almost all previous wars were defeated. Moreover, he cracked many enemy battles, and the battles he led also played a great role in the enemy. The important point is that in the book Water Margin, the author's Wu is under Wu Yong's ability.