Indeed, it is the "Xuanming Inner Breath Circulation"! This technique has fundamental differences from the water-avoidance skill!
The purpose of Xuanming's non-harmful practice is to repel and avoid water; the deeper underwater you are, the greater the impact and obstruction the water pressure and current have on the manipulation of the water-avoidance skill.
But the Xuanming Inner Breath Circulation is about swimming and diving! To put it plainly, it's similar to a type of body-hardening, body-cultivation technique. Yes! This is the freaking legendary swimming technique!
"If you can't swim, don't go into the water!" Li Fan shouted arrogantly, shuttling back and forth like a loach, circling around the three monks who couldn't dodge in time. Seizing the opportunity, he would make a stab here, a stir there, and in a moment's effort, he had sliced the three into a bloody mess.
