If you recall CC's former signature, it was a reference to the concept that SWORD GOD Zhuo Bufan fathered Dugu Qiubai and Feng Qingyang's swordplay.
(Although it's probably not the author's intention, let's stretch our imaginative logic for the fun of it, also known as POIIFTFOI: Pointing Out Interesting Ideas For The Fun Of It)
Could it be true? SWORD GOD Zhuo Bufan was said to have reached the peak of perfection in swordplay... but specifically, it was the peak of perfection in the accuracy and speed of sword positioning. The way he deliberately extended the sword tip on top of Xuzhu's head at the last minute, was truly a surprising position. And what is Linghu Chong's most prized acclaim? Surprising sword positioning!
Would it be a stretch to propose the possibility that one who has reached the summit of excellence in sword positioning, could possibly be the father of the swordplay technique which has the attribute of producing surprising sword positioning?