Among the numerous secret techniques of the Sun family, there is a martial arts skill that isn't recorded in words, but rather engraved on stone slabs in the form of drawings.
Please note that it is "entirely" composed of drawings without a single word; in other words, this martial arts skill not only has "moves without mental methods," but also lacks even a "name."
Perhaps for the average person, learning such martial arts would be relatively difficult, but for Sun Yixie, who was "illiterate," it turned out to be the skill he learned the fastest.
It was also the only skill he had completely mastered before leaving Hangzhou, so it was not transcribed onto paper.
Since this martial arts skill itself had no name, Sun Yixie gave it one himself—Xie Boxing.
The name not only incorporated the character "Xie" from his own name but also sounded similar to the name of a martial arts style created by a kung fu master from his previous life's universe.