Although Guangzi wasn't good at martial arts, he was an extremely smart person.
When he was little, out of boredom, he had read about the Lingxiao Ice Finger in the Book Collection Pavilion and learned a few of its postures.
Back then, at such a young age, he had already noticed that the Lingxiao Ice Finger Power from the Northern Territory and the Yun Family's unique Ultimate Skill, the Medical Essence Divine Needle, showed very similar traits when used.
Recalling this incident now, Guangzi quietly pulled a swap of dragon and phoenix, using his own Medical Essence Divine Needle in the style of the Lingxiao Ice Finger from the Northern Territory.
At the time he was only taking a fluke mentality, wanting to pin the blame on Xi Jiuye, letting the Divine Realm discover that Xi Jiuye's movements had been exposed and that he'd secretly come to the Human Realm.
