What do you mean it's cold without wind?

It means to describe mild cold weather.

In ancient China, the slight cold was divided into three stages: the first stage was Yanbei Township, the second stage was that magpies began to build nests, and the third stage was that pheasants began to swim.

Houyi Yanbei Town 1

Among migratory birds, geese migrate along yin and yang, and at this time, the yang has moved, so geese begin to migrate north;

2. The second waiting magpie began to build a nest.

At this time, magpies can be seen everywhere in the north, feeling the sun be the spirit and starting to build nests.

3. The third-class pheasant begins.

The word "pheasant" means singing. As April 9th approaches, pheasants can sing.

Slight cold is around March 9th, as the saying goes, "Cold is in March 9th", and its cold degree can be imagined, which can be proved by popular meteorological proverbs all over the country. For example, in northern China, there is a saying that "slight cold and severe cold, dripping into ice", and in southern China, there is a saying that "slight cold and severe cold, dripping into ice".

Extended data:

The slight cold solar term is the 23rd solar term among the 24 solar terms and the fifth solar term in winter. Literally, slight cold means that the weather turns cold, but it has not reached the extreme cold level. However, from the meteorological point of view, slight cold is colder than severe cold solar terms. There is a saying in the countryside that "it is cold in three or nine days, but hot in the dog". Because March 9 is after the slight cold solar term, the weather will actually be very cold after the slight cold.