What are the benefits of ornamental fish seven-star knife in geomantic omen?

Seven-Star Knives, like Arowana and maps, have a strong sense of suffocation, so several seven-star knives are produced.

Born Sha Qi is very small. If you keep hundreds of seven-star knives in a big fish pond, you will have evil spirits.

The gas will be stronger. But how do ordinary people raise so many? In fact, they all love to raise fish.

Good people like to raise fish, which can only be regarded as ornamental fish.

It is said that this kind of choking fish is good for industry. But I don't think so, because

There is no scientific medical evidence.