Excuse me, what does "smoke on the shelf" mean in the twelfth solar term of Song Dynasty? thank you

Tobacco rack refers to drying dry cigarettes. Whether the tobacco leaves have eaten enough dew in the Millennium season, put the cigarettes on the shelf to dry.

Twenty-four songs in Northeast China:

In spring, the sun shines brightly, the rain turns along the river, crows crow, the spring equinox is dry, and wheat is planted in Qingming. In Grain Rain, fields are sown. Long summer, goose feathers live, birds are full, mang shovel, summer solstice is not cotton, summer heat is not hot, beginning of autumn is busy building lakes in the dog days of hot summer, and the summer heat moves knives and sickles, white dew smoke is put on the shelves, the autumn equinox is not born, the cold dew is not cold, and the first frost is cold.

Extended data

The Millennium is one of the twenty-four solar terms in the lunar calendar, and it is called the Millennium solar term when the sun reaches 165 degrees. Millennium is the third solar term in autumn, marking the end of Qiu Meng and the beginning of Mid-Autumn Festival. Dew is water droplets formed by condensation of water vapor on the ground or near-earth objects due to temperature drop. So the Millennium actually indicates that the weather is getting cold. At this time, people will obviously feel that the hot summer has passed and the cool autumn has arrived. The temperature difference between day and night can reach more than ten degrees.

Yang Qi reached its peak in the summer solstice, and these two extremes must be reversed, and Yin Qi also rose at this time. When it comes to the White Dew, the yin gradually increases, and the morning dew gradually thickens and condenses into a layer of white water drops, so it is called the White Dew. As the saying goes, "eighteen pots of summer heat, not exposed to the Millennium." These two sentences mean that it is still hot in summer, so you must take a bath with a basin of water every day. After eighteen days, in the new millennium, don't be shirtless and naked, lest you catch cold. There is also a saying: "White dew and white fans, the autumn equinox is beautiful." This means that if there is dew before and after the white dew, the late rice will have a good harvest.