What is the essential difference between ancient forecast (Zhouyi) and modern forecast (weather forecast)?

Haha, the answer on the second floor is really good.

The popular prediction of Zhouyi is based on the principle of Yin-Yang and Five Elements. To put it simply, ancient China people divided everything in the world into five forms: gold, wood, water, fire and earth, plus two states of Yin and Yang (this classification is not static, but also constantly changing), and made predictions according to their own states and transformation laws, that is, they used a philosophical theory to explain everything in the world, so everything can be predicted. Chinese medicine is also one of the branches, so it is difficult for modern medicine (western medicine) to accept Chinese medicine, mainly because it can't understand the five elements theory of qi.

Although modern forecasting emphasizes science, it actually relies on experience to make predictions in the field of sociology. Including the weather forecast, part of it depends on the weather situation in the same period last year.

As far as weather forecast is concerned, ancient predictions are also very accurate. The following is a passage from Meng Xi's Bi Tan.

Physicians have the skills of five movements and six qi, and they all have methods to deal with the changes of heaven and earth, storms in cold and summer, floods and droughts; The illness of little people also rises and falls with fate. Nowadays people don't know what to use, but if they stick to a fixed method, their skills will not be tested. If Jueyin is used for something, its qi is windy and the people are sick and wet. Is it windy, and everyone in the sky is sick and wet? As for cities, unlike rain, what is the fate? All desires are absurd, and you can't get them. Generally speaking, physics is constant and changeable: those who are dominated by luck,

Often also; Those who are dominated by different husbands have changed. Often just like the original qi, changes are everywhere, and each has its own share. Therefore, there are changes from obedience, rebellion, lewdness, repression, victory, repetition, excess and deficiency, and the methods are different. If you use Jue Yin and the wind is lush, it is called submission; The weather is sunny, dry and windless, which is called inversion; Too faint, running water is not ice, which is called lewdness; The wind breaks the wood and the clouds are turbid, which is called depression; Shan Ye is scorched and the vegetation is withered, which is called victory; Burning in summer, moths and locusts are disasters, called recovery; Landslides and earthquakes are too many when Egypt is unconscious; It's always dark, and the sky is heavy and the clouds are light. This is called inadequacy. As it changes, the disease should be treated. They all looked at the time while waiting. Although Wan Li is apart, the climate is different, but it should be completely different. How can I stick it to a card? In Xining, the capital has been dry for a long time, so pray for the best, it will be cloudy for several days, and people say it will rain. One day it suddenly cleared up. It's very hot today. When you get to the right place, ask about the rain period. I said, "I've seen the rain period. It's tomorrow." Many people say the frequency of this day is depressing, but it is still

There is no rain, so do, is there any hope? The next day, it rained heavily. It's time to make use of wet soil. Those who are cloudy for several days are effective from qi, defeated by Jue Yin, and fail to make rain. If it suddenly clears up the next day, dry gold will wait, syncope will be discounted, the moon will stretch, and tomorrow will be lucky, so we know it will rain. This is also an occupied place. If you wait elsewhere, you will occupy a different place. Wonderful, can't send. Push this and that, be reasonable.

It is completely predicted by the five elements.