What do you mean by hanging koi fish?

Koi fish stands for good luck and is also a symbol of good luck. Many people will hang pictures of koi fish at home to improve their geomantic omen and enhance their fortune.

In the traditional culture of China, koi fish has the symbols of auspiciousness, good luck and prosperous career. Therefore, China often takes koi fish as a mascot, and wears koi fish or hangs koi fish at home, which symbolizes that it will bring good luck or drive away bad luck and contribute to the rise of the cause.