.

Our goal is to make a scientific, rigorous, vivid and interesting platform for the popularization of earth science.

Yang Guifei eats litchi

"as soon as the concubine of the world of mortals smiles, no one knows it is litchi." in his poem, du Mu depicts the postman who came all the way to the Huaqing Palace to deliver litchi to Yang Guifei, reflecting Yang Guifei's love for litchi. Some data show that Yang Guifei probably liked to eat litchi since she was a child. "Yang Guifei was born in Shu and is fond of litchi," written by Li Zhao in the Middle Tang Dynasty. " Then a question arises here. We should know that Yang Guifei's father, Yang Xuanfu, is only a Shuzhou householder under seven grades, and his salary is not high. Why does Yang Guifei, who was born in Sichuan, eat lychees?

The answer to this question may be unexpected. In fact, Sichuan was one of the main producing areas of litchi in the Tang Dynasty. Zhang Ji, a poet of the Tang Dynasty, wrote Chengdu qu: "the Jinjiang River is green near the west, and the litchi is ripe at the top of Xinyu Mountain." it shows that a large area of litchi forest was planted in Chengdu at that time. And because Lingnan, another major litchi producing area, is too far from Chang'an, it is not easy to preserve litchi on the road, so Li long and other scholars speculate that the lychees sent to Chang'an for Yang Guifei are mainly produced in Sichuan. Then readers will wonder, since litchi was so common in Sichuan in the Tang Dynasty, why do we seldom hear of litchi in Sichuan today?

Litchi that we often eat now

However, although many studies have shown that climate change had a significant impact on the production and development of ancient times and the rise and fall of dynasties, as the famous meteorologist Mr. Zhang Deer said: "the rise and fall of Chinese dynasties, climatic conditions have an important impact, but it is neither a necessary condition nor a sufficient condition. Avoid getting caught up in climate determinism. For example, the Ming and Qing dynasties are generally in the cold "Little Ice Age" climate background, but there are still prosperous periods such as Hong Xuan and Kang Qian, which shows that the climate background and social development do not necessarily correspond completely. The rise and fall of Chinese dynasties is the result of the joint action of many factors. The role of climate factors can not be ignored, but it should not be exaggerated.

Seeing here, some people may wonder: since the temperature in the Tang Dynasty was one or two degrees higher than it is now, and because of this, the Tang Dynasty seems to have developed better, then why are we so sensitive to the current global warming? after the temperature goes up, don't we go back to the Tang Dynasty? the editor thinks the answer is no. Perhaps many people have a dream of restoring the prosperity of the Han and Tang dynasties, but even if we are close to the Tang Dynasty in temperature, because great changes have taken place in our way of production and life compared with the Tang Dynasty, we have moved from agricultural civilization to industrial civilization, so increasing the warmth of one or two degrees will not bring us a great improvement in productivity, and the social and economic level will not be significantly improved as a result. And now a considerable number of people and most of the economically developed areas are concentrated along the coast, once a sharp rise in temperature causes many problems, such as melting of polar glaciers, rising sea levels, restructuring of atmospheric circulation and frequent extreme weather, it is likely to do more harm than good for us. Therefore, in order to deal with climate change, our government has made a strategic decision of carbon peak and carbon neutralization, and wish the motherland a smooth realization of carbon peak and carbon neutralization.