The twenty-four solar terms are called the fifth invention of China. Why can solar terms be as famous as papermaking and compass?

24 solar terms Song is regarded as the fifth greatest invention of China. Maybe people in many cities don't have a particularly intuitive feeling about this thing. They think it's just something in the textbook. Similar to the same thing in life. I have studied in primary school textbooks, but I don't think it is of much use in my daily life. But not for rural farmers, he is really useful.

The solar term song represents the agricultural farming season, that is, when to do what? For example, Grain Rain planted melons and beans before and after, which is true. Because people have been doing this for thousands of years, in the areas along the Yellow River, some fruits and vegetables can be planted around Tomb-Sweeping Day, because the ground temperature can't meet the requirements even earlier. Now we can monitor the low temperature conditions, humidity, moisture and fertilizer in this place through science and technology, but in ancient times, there was nothing so advanced. In ancient times, people relied on experience, so they were sure that Tomb-Sweeping Day could grow fruits and vegetables normally in most areas every year.

People's hundreds of years' experience includes many rhythms in agriculture: when to sow, when to harvest, when to weed, when to plant fruits and vegetables, and when to plant crops. People in ancient times did not have so many people and sources of information as they do now. They used these twenty-four solar terms to grow things according to the stipulated time, which lasted for thousands of years, because it really had practical value. Even now, because the scope of this spread is getting wider and wider, it is not necessarily right to go to the south. Because it first appeared in the Yellow River area, it still has its own research significance.

Because this thing can appear not only because of the farmers' own grasp of the seasonal seasons, but also because of the knowledge summarized by many astronomical observers of the ancient venture dynasty according to the climate corresponding to the seasons and the corresponding lunar calendar time. The descriptions of these 24 solar terms correspond to the lunar calendar. There are two solar terms in a month, and 12 month has 24 solar terms. This mastery is the result of countless people's summary, and it is the most refined and useful. It helped the agricultural production in ancient China for hundreds and thousands of years.