Chen Hongmian was a little helpless when he heard this: "It's not that I don't want to invite the governor, but your prediction about the disaster is really important, don't you see that I am directly reported to the imperial court?" Even Shangguan can't reveal it casually! ”

Hua Xue wondered: "My lord, you are just the prefect, and you really can't casually disclose this kind of prediction to others, but didn't that one just leave?" Didn't you consult while he was there? ”

Chen Hongmi was even more helpless: "Originally, it was the right thing to inform the governor, but the governor is still supervising the army, so he can't change the commander in battle, right?" And these messages cannot be sent to the war zone. I can only wait for the governor to report to him. The reason why I am consulting your opinion now is that I got the news that in Wujiang County, the rainy season has not arrived in the past few days, and the work is rushing, so I want to ask, once it is out of time, I have to send someone to stop it and stop the project first. ”

Hua Xue had just read Zhang Guowei's information and knew that he was dragged to Anqing by a sudden war in the middle of the water control project. Suzhou is located in the north of the first line of the Huai River in the Qinling Mountains, in any sense, it is called the south, and the practice of drought and flooding in the north is often encountered in Suzhou, and Zhang Guowei's approach is no problem at all.

And the facts have also proved that in the years after Zhang Guowei controlled the flood, there was no flood in the south of the Yangtze River because of the river. Only the continuous rain fell from the sky, directly soaking the crops in this pure natural disaster, and the drought caused by the lack of rain all year round.

Hua Xue shook her head and said, "Master Chen, don't worry. The governor was anxious to control the water, and obviously realized that the climate was abnormal, and the situation of drought in the north and flooding in the south, Suzhou was located in the south of the Yangtze River, and floods could break out at any time. And even in the event of a drought, the dredging of this river is beneficial and harmless. Even if the drought is severe, it will not dry up Taihu Lake, otherwise how can the people live? Whether the river is dredged or not, it doesn't matter. And as long as Taihu Lake is not dry, think about it, is it a deeper river with water, or a shallower one? ”

"Nature is deep. I see. As long as there is water in the river, there will be water for the people who flow through it, and the drought can be alleviated. Chen Hongmi breathed a sigh of relief. If the dredging of the river channel instead drains the accumulated lake water, so that there is no water available during the drought, it is a natural disaster and a man-made disaster.

Thinking of Hua Xue's previous statement, Chen Hongmi asked again: "What do you mean when you said earlier that you should sort out the content related to agricultural equipment first?" ”

"The so-called 'if you want to do a good job, you must first sharpen your tools'. Whether it is water control or farming, the advanced equipment can save a lot of energy and make twice the result with half the effort. In fact, this part is not only ordinary agricultural tools, but also the structure of bridges, which is quite specialized. This is also what I thought of in the previous article, since you want to build a bridge, you have to build it strongly. Although the West Lake Broken Bridge is a scene, it is still durable to repair the bridge and pave the road on weekdays. ”

Chen Hongmi, a liberal arts student in the Department of Internal Affairs, naturally did not understand structural mechanics, and was very surprised when he heard this: "Is there anything to say about this?" Is there a big difference in the craftsmanship of stonemasons that have been passed down from generation to generation? ”

"Adults should know that the bridges in the world are not all stone bridges. In addition to the material differences such as wooden bridges and rope bridges, there are also differences between stone bridges and stone bridges. The most important difference lies in the structure of the bridge, whether it is a plate bridge or an arch bridge. ”

Chen Hongmi nodded, he is a native of Fujian, and he has been an official in Jiangnan for many years, and he has seen more than one hundred and eighty bridges, and he is naturally familiar with plate bridges and arch bridges, but he doesn't know the difference.

"The slab bridge is simple, if you can find a natural large stone slab, even like a single-plank bridge, you can directly build a stone bridge. However, the slab bridge is not durable, and the weight of the slate itself is a burden on the bridge body. But if the slate is too light, it is not strong. Arch bridges, on the other hand, are quite complex and highly technical. But as long as the technology is high, the arch bridge can not be broken for thousands of years. ”

"Thousands of years?" Chen Hongmi was surprised, "A hundred years is already a great political achievement, but a thousand years is too exaggerated, right?" ”

Building bridges and paving roads is quite a good reputation among the people. Unlike roads, stone bridges can be inscribed. Therefore, since ancient times, when the bridge is built, the deeds will be engraved on the bridge, which will be immortal and famous for future generations. And the literati, isn't that what they are pursuing?

Hua Xue smiled: "As far as I am concerned, I know that there are two bridges that have been in use for thousands of years and are still in use. Adults know about the small business bridge, right? ”

"But is it the small business bridge that General Yang Zaixing died in battle? Isn't that a bridge from the Song Dynasty? How can there be a thousand years? ”

"Adults only know one thing, but they don't know the other. General Yang died in Xiaoshangqiao, which was only the most tragic battle for Xiaoshangqiao. After all, it was 300 to 120,000, and the disparity in military strength was too great. But on the other hand, isn't it because Xiaoshang Bridge is located at a key point, and it is a place where soldiers must fight? Since the construction of the small business bridge in the Kaihuang period......"

"You said in the Kaihuang period? Emperor Wen of Sui? ”

"Hmm. If the student remembers correctly, the small business bridge was completed in the fourth year of the emperor's reign, 1,53 years ago. ”

Chen Hongmi was not surprised that Hua Xue actually knew exactly how long it was four years ago to open the emperor, if Hua Xue didn't even know this, then his so-called knowledge of astronomy was completely impossible to talk about. But the bridge of more than a thousand years still gave him a great shock.

Hua Xue continued: "Xiaoshangqiao is located in the Central Plains, whether it is the end of the Sui Dynasty, or the Anshi Rebellion, the end of the Tang Dynasty, the Huangchao, the Song and Jin confrontations, almost every turmoil, Xiaoshangqiao has to undergo a baptism of war, almost a thousand holes. However, whether it is the Tang Dynasty and Song Ancestors, or Genghis Khan, they have all been ancient, although the small business bridge has also been repaired by the past dynasties, but its main body is still the original one of the Sui Dynasty. ”

Seeing that Chen Hongmi seemed to be a little unimpressed because the small business bridge had been repaired by successive dynasties, Hua Xue took another example: "Adults seem to think that the repairs of the past dynasties have made the small business bridge have a lot of moisture during its thousand-year service life?" It doesn't matter, there is another example for students. In Zhaozhou, Zhending Prefecture, there is a big stone bridge, which is 20 years later than the small business bridge, and was completed in the first year of the great cause, which is 10032 years ago. Because it has rarely experienced wars, the tests it has endured are basically natural disasters such as floods, earthquakes, wind and rain. Less than ten repairs in the past dynasties have also been leveled on the bridge deck. The entire arch bridge, even the pattern of the main body, is still left by the Sui Dynasty. And according to the student's speculation on the use of the bridge, at least for more than 300 years, the bridge is still the same strong, you see, there is always some convincing, right? ”

The reason why Hua Xue only predicted more than 300 years later was not that there was something wrong with the Zhaozhou Bridge at that time, but that it was recorded in Hua Xue's information that the Zhaozhou Bridge was already a cultural relic after that, and it was protected and not used.