White dew and cold dew belong to two solar terms in 24 solar terms, China. These two solar terms are after beginning of autumn, representing the change of weather and temperature. Relatively speaking, the temperature in the Millennium is higher. At this time, it is recommended not to show your arms and legs, so as to keep warm; After entering the cold dew, you need to put on socks and warm your feet to get sick less. This statement? White dew is not exposed, cold dew is not exposed? It is to remind people of the changes in the weather, make people pay attention to the changes in clothes, and make their bodies less sick. Accurately speaking, it refers to entering the Millennium season, and the weather turns cold, so it is not appropriate to run naked shirtless from now on; It is colder in the cold dew season, so you need to pay attention to keep your feet warm. It's actually quite understandable. The ancients always added clothes according to this custom and paid attention to keeping warm.

Temperature change

Millennium is the15th solar term in a year. At this time, the position of the sun shifted to the longitude of the Yellow River 165 degrees, and autumn entered the Mid-Autumn Festival. Although the ancients were not as technologically advanced as they are now, they could accurately measure how much the weather and temperature changed, thus reminding themselves to add clothes, but they knew how to grasp the time of sunrise and sunset. ? White deer? The origin of the name, the ancients recorded:? Water and soil moisture condense into dew. Autumn belongs to the color of gold, golden white and white dew, and the gas begins to be cold. ?

This record clearly shows that after entering the Millennium, the moisture in soil and water will condense into dew, which may continue to be hot during the day, but it will gradually make people feel chilly at night. At this time, the temperature difference is also relatively large, which can accelerate the condensation of water vapor in the air into water droplets.

Interval variation

The difference between cold dew and white dew is 30 days, that is, one month, when its temperature is even lower. In the 24 solar terms, it is recorded:? In September, the dew is cold and will condense. ? This means that the water at this time can be condensed into dew at night, which is obviously colder than the white dew and even solidified into frost. At this time, people are advised not to show their feet.

In ancient times, although people were not as technologically advanced as they are now, they were good at discovering common phenomena in life. For example, water vapor, as we all know, is easy to form when the weather is hot, but when the temperature decreases, the water vapor will gradually decrease and become dew, and if the temperature is lower, it will be frost.

Health preservation change

In ancient times, although the lifestyles were different, people also paid great attention to health preservation, such as? White dew is not exposed, cold dew is not exposed? It is the cold and warm measures that should be paid attention to in these two solar terms. In addition to paying attention to adding clothes, this solar term also needs to prevent dryness in autumn. In autumn, there is little rain, the weather is easy to dry, and the temperature gradually decreases. At this time, it is cold outside and hot inside, and people are prone to catch a cold and get sick.

Therefore, after entering autumn, people need to prevent dryness, pay more attention to lung diseases, and eat more foods beneficial to the lungs, such as white foods, such as yam, lily, tremella, carrots and so on. And drinking more soup and porridge is good for people's health.