The sunrise position is the same as the time described in the poem "Frost falls and the water dries up, and the leaves fall at the end of the year."

The same time and sunrise position described in the poem "Frost precipitation and water drying up, and the leaves falling at the end of the year" is that the light rain on the street is as moist as crisp, and the color of grass looks far away but not up close.

Frost Descent is the eighteenth solar term among the twenty-four solar terms and the last solar term in autumn. Douzhixu; the sun's yellow longitude is 210°; it is celebrated every year on October 23-24 of the Gregorian calendar. After entering the frost season, the scene of late autumn is obvious, and the cold air moves southward more and more frequently. Frost does not mean "frost", but means a sudden drop in temperature and a large temperature difference between day and night. On the national average, "Frost" is the time of year when the temperature difference between day and night is greatest.

In the frost season, all things are completed and completed in Xu, the sun sinks to the ground, the yin energy begins to condense, and the weather becomes colder starting with the frost. Since "Frost" is a sign of cold weather and large temperature differences between day and night, this solar term is named after "Frost Descent", which means "a sudden drop in temperature and a large temperature difference between day and night". The characteristics of the frost solar term are that the weather is colder in the morning and evening, and hotter at noon. The temperature difference between day and night is large, and autumn dryness is obvious. The frost festival mainly includes the customs of appreciating chrysanthemums, eating persimmons, climbing high and overlooking the distance, and taking supplements.

Frost is the last solar term in autumn and the transition from autumn to winter. In the frost season, all things are completed and completed in Xu. The sun sinks to the ground and the yin energy begins to condense. The cold weather begins with frost. "Yi Zhou Shu·Zhou Yue": "The middle Qi of autumn in March are: the end of heat, the autumnal equinox, and frost." Wang Chong of the Eastern Han Dynasty said in "Lunheng": "Clouds and mist are signs of rain, dew in summer, frost in winter, and warmth." When it is cold, it is snow. When rain and dew freeze, they all come from the earth, not from the sky. "Whether it is dew or frost, "they all come from the earth, not from the sky."