The difference between crossing a canyon and bundling natural gas.
Bundle, something gathered together in a line. From Long Mai's own point of view, Long Mai became thick from coarse to fine, and pulse qi converged into one in fine points, so it was called "bundle qi". If you stand in the air and look at the gas, the mountains escorted on both sides become canyons, and Long Mai gas passes through the canyons, so it is called "crossing the gorge".
Traditional geomantic omen has brought geomantic omen the hierarchical concept of three cardinal principles and five permanents in the world, and the monarch, minister and father. In essence, ethics and geomantic omen theory are irrelevant. Humanity and morality belong to social science, and it is absurd to interpret natural science with humanity and social science. (The article is for reference only)