What does it mean for ha that a bird enters the water?

What does it mean for ha that a bird enters the water? Introduction is as follows:

Birds become mussels when they enter the water (solar terms), which means that all birds disappear in the cold weather in late autumn. The ancients saw a large number of clams suddenly appearing on the seashore, whose stripes and colors were very similar to those of birds, and thought they were birds.

The three phases of the cold dew solar term are: first, geese visit, second, birds enter the water to become clams, and third, chrysanthemums bloom yellow flowers. The guest of Hongyan refers to the geese moving south after the Millennium solar terms, the last geese flying south after the cold dew solar terms, and then entering the cold winter. When a bird falls into the water and becomes a clam, it means that all the birds are gone in the cold of late autumn. The ancients saw a large number of clams suddenly appearing on the seashore, whose stripes and colors were very similar to those of birds, and thought they were birds. Three chrysanthemums have yellow flowers, indicating that chrysanthemums are generally open at this time.

Introduction of cold dew

Cold dew is the seventeenth of the twenty-four solar terms, and the fifth solar term in autumn is also a solar term reflecting the characteristics of climate change. When entering the cold dew, there is cold air going south, the temperature difference between day and night is large, and autumn dryness is obvious.

In the cold dew season, the autumn in the south is getting stronger, the weather is sunny, and there is little rain and dryness, while the vast areas in the north have entered or will enter winter from late autumn, and most parts of China are under the control of cold and high pressure, and the rainy season is over.

Cold dew is a solar term reflecting the characteristics of climate change. The temperature difference between day and night is large, and I feel a little chilly in the morning and evening. In China, the traditional customs of cold dew mainly include enjoying maple leaves, eating sesame seeds, eating crabs and drinking autumn tea.