What is the nozzle in geomantic omen?

This is a very good and important question for people who study Feng Shui.

Explain clearly the "idolize Tactics" of the airport and the water port in the Preface to Qing Capsule;

..........'s "star-picking" tactics need to separate the mountain dragon from the water dragon. Because the shape of the mountain dragon is clear, it should be divined through the "vein" and "tuyere" respectively, while the shape of the water dragon is obscure, so the clear "trident nozzle" is used as the "tuyere" of the water dragon in the geomantic map, and because the water and the dragon vein are unclear, the world often thinks that the water dragon is not heavy. To this end, the hose only needs to carefully identify the "trident nozzle"!

After taking the two hexagrams of "Dragon" and "Air Mouth", it is necessary to judge whether these two mysterious hexagrams belong to a couple through the formula of "getting stars". If they match, it will be blessed and magnificent! If it is not a well-matched game, it must be used to prevent the disadvantages of being rich and poor. .......

Therefore, strictly speaking, "Shuikou" is the abbreviation of "Trident Shuikou", which means "air port".