According to the Book of Changes, the first of the Five Classics:

1, water is the innate wealth of the earth, water is the source of life, and wealth has the power to breed. Water is explaining this truth, so water has been used as wealth since ancient times. Like mountain owners, water is the main wealth.

2. Rainy days are dry and rainy, rain falls from the sky, and money falls from the sky. Rainy days are the season for heaven and earth to collect money.

3. Human feet belong to the five behaviors of soil in human body, and soil is water, which can be said to be the power of soil to control water.

Based on the above, it is not difficult for us to understand the folk saying that stepping on the rain can make money when it rains!

Therefore, talking about business on rainy days has a good meaning of gathering wealth.