Why did Lu Zhu break the water sword?

Because of my high martial arts, I cracked the water-breaking sword. Lu Zhu is a character (also played by Confucianism) in the movie Sword Rain. His Buddhism and martial arts reached a sacred place. He cracked the masterpiece of Wheel King-water-digging sword with four tricks. The water-breaking sword used in drizzle belongs to soft sword. If you want to use soft sword, you must have enough internal force, otherwise you can't control the direction of its blade and tip (the reason why Ye couldn't play its due power later), but soft sword's shortcoming is that the user has a dependence, and Lu Zhu just saw this layer, so the rain in Mao Mao has been completely suppressed in the move of "clear and turbid", and the rain in Mao Mao has been unable to control the direction of the broken water sword in the constant rotation. At this time, the use of internal force has reached its limit, and the defeat of this move has been decided. This is the way to crack soft sword, so it is better than the wheel king of the last World War. I can't believe there is such a method.