What is the nozzle in geographical geomantic omen? Does the water seen in the cave flow to the invisible place, or does it flow to the invisible river junction in front of the cave?

The so-called nozzle refers to the inlet and outlet of water flow. On the one hand, the ancients realized that water flow would affect Qi: "Those who are the yang of Qi walk in the wind and those who are the yin of Qi walk in the water." "Destroy Yin and Yang and respect people's houses." On the other hand, people think that water is the master of wealth, so Shuikou is especially recognized as the patron saint and lifeline. The sign of a suitable nozzle is: the door opens and the main door closes. That is, the place where the water comes is called Tianmen, so it should be wide. The place where the water goes is called the local household, and it should be closed and sheltered. Water is the source of life, it can support everything. Traditional geomantic omen holds that water is a financial resource. If architecture and geomantic omen are combined, it will naturally generate wealth and bring financial resources to the owner. But if buildings and sprinklers are fierce in geomantic theory, then this water source will bring disaster to the owner. Therefore, Feng Shui pays the most attention to Shuikou, which is the method to determine the good or bad luck of Shuikou. The so-called sprinkler, in fact, is to adjust the relationship between building orientation and running water, so that water is in the best position. "Water" in modern geomantic omen refers to all flowing gas fields, such as roads and water pipes. The methods and main schools of measuring nozzles are listed below.