Because Water Margin is a semi-underground novel in Ming Dynasty. The great development of novels in Ming dynasty. If you want to sell well, it is nothing more than writing red and yellow. Red is blood. Yellow is pornography. It's almost the same as the writer who started now. According to ancient moral standards, heroes of the Water Margin cannot approach women. So I'm going to write about bloody violence. From the author's point of view, Song Wu stabbed Pan Jinlian and Magnolia with a knife, which all contained a little hint. As far as readers are concerned, they can also get some pleasure from sexual abuse from bloody scenes. Director Li Hanxiang knew Pan Jinlian when he was filming Song Wu. When Song Wu stabbed you, you acted as if you had been stabbed by Song Wu's penis. This shows that Li Hanxiang really understands the Water Margin.

As for the details you asked, it belongs to fiction. No one has ever seen how to kill 13 people with a knife. Lao Shi just let go of his imagination. Song Wu wanted to kill Zhang Dujian, Zhang Yong and Jiang Menshen. But others can't do it unless they kill them. At this time, let Song Wu calm down, think about using acupoints to restrain other irrelevant people and only kill three main people. Obviously unrealistic. As for which to kill first, which to kill later, and where to drag the body. They are all platitudes, and there is no necessary logic.