According to legend, one day a monk asked the Buddha: "Why do the prayer flags on the flagpole of the altar move? One is that the wind moves, the other is that the flags move." Buddha hand Nianhua, smile cloud: "This is the heart of benevolence. Later people cloud: "Whirling the world, all changes are not due to the cause of the mind, a read life, a read out, the sea." If the time into a read, someone asked how much between a read? Buddha Cloud: "A moment is a thought, and 20 thoughts is a moment. Twenty seconds is a snap." Things change in a blink of an eye. Some people say that the vast universe is parallel. Some say the vast sky can be passed through by black holes. 1 Others say there are wormholes in the stars, through which one can travel through the river of time. However, time is a knife to most people in the East Xuanyu of the Five Realms. Most practitioners work hard all their lives, dreaming of breaking through the world and having a long life, but at the end of life, time is just a knife.