Explanation: The original meaning is that the trend and direction of the mountain fluctuate like a dragon. Now compare the cause and effect of a thing or the origin of a person. It is also reflected in feng shui. Dragon: People who studied Feng Shui in ancient times compared the rolling landscape to a "dragon". Context: The place where the faucet is located is called context. Being located in the context will be auspicious, smooth and prosperous. (1) From the dragon's head to the dragon's tail, the terrain as coherent as a vein is called "vein". (2) metaphor of the origin of people or things, or the cause and effect of things. Also known as "context."