＜Slight Cold＞ was still cold,
but it was not the coldest.

＜It was very cold in "slight cold", peopel and horse were safe.＞
After winter solstice,the weather was getting cold to tally with the exchange of season.
people and domestic animals were safe without disaster.

A boy of "slight cold"blew breeze and the earth was cold.
It implied that people have to be calm and to meet New Year's challenges.