As the saying went, differences in professions were like mountains. One could imagine the difficulty of suddenly switching from throwing cards and flying needles to practicing knives.
Be it the unique way of exerting force with the saber, the physical changes to be made when controlling the saber, or the consumption of physical strength during practice, they were all unfamiliar to Su Yun.
It was better to follow Lü Hongya's instructions and refer to the way in which knife techniques were used in Chinese martial arts.
Although martial arts were martial arts like mixed martial arts and combat, and were very realistic and down-to-earth, they were completely different from his supernatural cultivation. However, they were analogous!