1. In traditional Chinese culture, nine is the number of the supreme and yang, which has an extremely noble meaning. In Feng Shui, it is believed that raising 9 koi carps with the right cross star hanging on them can bring harmony to the family, smooth family fortune, and abundant wealth. It is the most auspicious and the most profitable.

2. If the fish tank at home is not very big, it is also good to raise a goldfish. In Feng Shui, raising a fish means "white water", which means wealth.

3. It is also good to raise three fishes. There is a saying that "three sheep bring prosperity", which means auspiciousness and wealth. When choosing koi, it is appropriate to choose red as the main color. It is best if the red is bright and the white is bright, which makes people feel comfortable. It is necessary to avoid choosing koi with black spots, especially completely black fish. It is believed that all black is too murderous for the home environment. Although it can resist evil spirits, it also kills wealth and blessings.