The ancients believed that everything in the world is produced by Qi. If a person has Qi, he will live, and if he does not have Qi, he will die. When Qi encounters wind, it disperses, and when it reaches water, it stops. Therefore, getting water is the top priority, and hiding wind is second. This is Feng Shui. Feng Shui arises due to Qi. The ancients believed that the earth also has its own veins. Mountains are the obvious veins, so mountains are revered as dragons, and major mountain ranges are called dragon veins. Call the water a water dragon.