"A ride on the world of concubines, no one knows that it is lychee coming." This is the most popular lychee advertisement in in the Tang Dynasty. Yang Yuhuan interpreted it as the best spokesperson for lychee in the Tang Dynasty. Taihu and citrus often appear in Tang Dynasty poems, which have become the code to reveal the rise and fall of the Tang and Song dynasties.
Where does the lychees Yang Yuhuan produce? This seems to be just a problem of luxury fruits, but it laid the groundwork for the rise and fall of Yang Yuhuan and the Tang Dynasty. In the Tang Dynasty, Sichuan was also the origin of lychees. Yang Yuhuan, who lived in Sichuan since childhood, naturally had a hobby of eating lychees. After she was favored by , Tang Xuanzong , she had the scene described in the poem. As early as the Tang and Song dynasties, Yang Yuhuan ate lychees in his hometown and endorsed Sichuan lychees. Xie Fangde in the Southern Song said in "Annotation of the Tang Poetry Quatrains": "During the Ming Emperor Tianbao period, Fuzhou paid lychees, and went to Chang'an , the color and fragrance remained unchanged, and the imperial concubine was happy. The prefectures and counties were rushing to pass through posts and said that they were the best intentions, and the people and horses died, and they looked at each other on the road." Sichuan fellow Su Shi is also here "Lychee Sigh" says: "Yongyuan lychees came to Jiaozhou, and Tianbao years old tribute to Fu." "Han 3 Du Shi Detailed Notes " also believes: "The tribute from the Tang Dynasty is the lychee of Fuzhou, which goes from Ziwu Road, not the South China Sea."
This was not a rare thing during the Sui and Tang Dynasties, because the whole of China is in a warm period, and examples of warming climate are not just lychees. The palace of the Tang Dynasty also produced citrus. These citrus are either tributes, or works by Yang Yuhuan's ex-father-in-law Li Longji . Li Longji sent people to plant citrus in Penglai Hall in the Daming Palace, and there was a good harvest. The Tang Dynasty notes "Youyang Zazu" record that in the "Autumn of the Tenth Year of Tianbao (751 AD), several tangerine trees in the Daming Palace were 150, with a flavor exactly the same as those of the tribute citrus on the Shu Road in Jiangnan. Du Fu also wrote the poem " Sick Oranges " and mentioned the oranges in Penglai Palace. Orange Tree If you want to survive, the minimum temperature in winter cannot be lower than minus 8 degrees Celsius. Since 1971, there have been more than one case of minus 10 degrees Celsius in Xi'an. The lowest temperatures in November, December and January alone are minus 12 degrees Celsius, minus 14.47 degrees Celsius, and minus 16 degrees Celsius. Today's Xi'an area has long been no longer a place of citrus.
Climate warming during the Sui and Tang Dynasties was a rare scene in China in a thousand years. It lasted for more than three centuries. Litchi produced in Sichuan and citrus produced in Chang'an. Even , a large number of farmland appeared on of the Qinghai-Tibet Plateau. Tubo takes advantage of its agricultural and animal husbandry advantages to annex the nomadic tribes in Qinghai, Xinjiang and other places, and its power has increased greatly. At its peak, the population of the Tubo Empire reached 10 million, with a population of more than 5 million, which is more than the population of Tibet today. The maximum number of Tubo's troops exceeded 400,000. More than once, the Tang army left behind military achievements to behead tens of thousands of Tubo people. The Tubo Dynasty was much more bloody than the Turkic of the same period and the Eight Banners of Manchuria in later generations. The Tang army had difficulty in KOing Tubo, so it left a large number of garrisons in the northwest, and the Jiedushi was established during the reign of Emperor Xuanzong of Tang.
Due to the rising temperature, the Yangzhou area is rich in double-season rice, and the Tang Dynasty had a rare prosperous scene. Because of the rise in temperature and the increase in the number of enemies, the Tang Dynasty had to increase the number of troops stationed in the northwest to one-third of the country, and the border guards in the northeast and north China also mentioned them to one-third of the country, laying the groundwork for the Anshi Rebellion .
"When did the Emperor of Heaven send 6Ding , and see the double green. The lake connects north and south to clear the ice mirror, and the mountains are broken and east to form a screen. The rain covers the dragon returns to the sky, and the fish and boats pass by the fish and clouds. Riding the wind, I want to end my old age, Mr. Jiaoli is in Dongting ", this is "Inscription on Taihu" written by the poet Yang Ji in the early years of the Ming Dynasty. The scene described in the poem frequently appeared in the late Northern Song Dynasty. In the first year of Zhenghe in the Northern Song Dynasty (1111), Taihu Lake was frozen. This is not the individual weather in the Taihu area, but the climate in China has also undergone drastic changes. As early as 1110, Quanzhou encountered heavy snow, and all Fuzhou lychees that were offered to the Southern Song court in 1178 were frozen to death.
Before and after the Jingkang change , climate abnormalities frequently occurred.The summer of the first year of Jingkang saw a storm of the harvest season. "It was ripe for heavy rain, but it was damaged by seven or eight", and the millions of troops of kings became beggars. The Jin army arrived at Bianliang on November 24, and the capture of Bianliang was on November 25. During the entire month of siege, it was only a few days. At other times, it was either rain and snow or blizzards were continuous. With the help of the blizzard, the Jin army crossed the rivers and moats of the Northern Song Dynasty, defeated various reinforcements, and entered the city of Bianliang.
Climate has a huge impact on agricultural society, and with political deductions, many times God really pushed the decline of a dynasty.
