What's the meaning of Jiujiu Song and every sentence?

It's very cold in September and September. Without protection, your hands will be very cold and frozen outdoors, and you dare not show them.

It is colder in March and April. The river is frozen, and the ice is thick enough for people to walk on.

The weather began to warm up in May and June, and the willow trees in the distance began to sprout and turn green, and spring came.

The ice has begun to melt; The geese in the south return in August and September;

/kloc-after 0/999, the ground was frozen and it was ready to start farming, so spring farming began.

Lyrics:

1929, you can walk on the ice in 3949.

Five, nine, six, nine, watch the willows cross the river, seven, nine rivers open, eight, nine geese come,

99 plus 19, plowing cattle everywhere.

Extended data:

In winter, Jiujiu Pavilion is very popular because the cold weather makes people feel uncomfortable.

The written record of the custom of "counting nine" was first seen in the Chronicle of Jingchu written by Emperor Liang Zonggu in the Southern and Northern Dynasties in 550 AD. The emergence and spread of "99 Songs" has a long history. The custom of "painting nine" and "writing nine" in Ming Dynasty came into being and developed in the gentry class, which made the situation reflected by the number nine vivid. This is not only a scientific time activity to record weather changes, but also an interesting "winter" intellectual game. Whether it is painted or written, it is collectively called "99 Cold Map".

Nine days is nearly three months, which is a long time. From the ninth day to the ninth day, it is a gradual process from cold winter to warm spring. No matter what kind of "99 cold current map", as long as it is carefully drawn, it can truthfully record the specific situation of this cold current and warm current and become precious meteorological data. Not only for individuals, relatives and friends to understand the law of winter weather changes, but also to prepare for the winter and "winter" after death; It is to provide detailed and reliable reference and research data for scientists, first of all meteorologists and agronomists. What's more commendable is that the image in "Cold Elimination Map" embodies the principle that "objective things have changed from quantitative accumulation to qualitative leap".