Why does "99 Cold Map" only need to be written once a day?

In ancient times, the "99 Cold Map" was equivalent to an ancient way to relieve boredom, and it was also to record the period from winter to early spring and express people's expectations for spring at that time. The Cold Map of 1999 has been circulated for hundreds of years.

In ancient times, people had to stay at home for a long time in winter when it was inconvenient to travel, and they would get bored over time, so there was a "map of liberation in the cold in 1999", which was used by scholars at that time to relieve boredom in winter when entertainment activities were few. In the brief introduction of the scenery of the Imperial Capital, there is a drawing method of the relief map of the cold region in 1999, that is, before the beginning of early winter, scholars began to draw plum blossoms on a piece of white paper. First, they drew a sketch of plum blossom with nine petals. From the first day of 1999, they painted a petal every day until the end of 1999, and also drew a plum blossom picture, which is the most common.

The "99 Cold Map" is not only used to relieve boredom, but also a time record made by people at that time to welcome the arrival of spring. Winter started on September 19, and people recorded this day with "99 Cold Terrain Map" until the spring of 99. Therefore, many schools will teach children to draw a simple version of the "99 cold current map", combined with weather records, so that children can calculate the arrival of spring by themselves. This is like a diary now, which allows children to record their time in a cold winter with the "99 cold current map".

In the Qing Dynasty, the "Cold Map of 1999" gradually began to develop in the direction of poetry. People will choose a poem with nine words and nine strokes every day to kill time. Therefore, it takes 8 1 day to complete the "99 Cold Map", which is not too mysterious, but a fun activity for people to kill time and wait for spring.