Kong Jie's argument is strategic encirclement and centripetal attack, which was mentioned in the conversation between Ding Wei and Li Yunlong in the 28th episode. This kind of paper is purely military tactics. So the director didn't shoot it.

In fact, the title of Li Yunlong's original work is about special operations. After all, he once played against Yamamoto, and he once pursued Chu with a commando.

However, because the TV series finale needs to sublimate and highlight the theme and shine the sword, the title of the paper is changed to sword spirit.