It is said that the inner core of a skilled Water Demon and the eye of a Dragon Fish are essentially Water-Repelling Pearls.
As for the function of the Water-Repelling Pearl...
Ancient texts record that King Yu, in taming the She River, sought the Dragon Vein and placed the Water-Repelling Pearl, thereby the She River dared not flood, winding its way southeast.
Some say that there are different grades of the Water-Repelling Pearl; the weaker ones prevent drowning, while the stronger ones can even part the sea, allowing the bearer to walk as if on dry land amidst roaring waves.
Additionally, some Water-Repelling Pearls can enable a person to dive into the deep sea and enter the Dragon Palace...
Overall, it can be said that the Water-Repelling Pearl is a tool for avoiding and controlling water.
Curious, Xu Qing took the pearl to the riverside. A milky white halo emanated from it, causing the river water to part as if encountering an immovable boulder.