After saying this, Li Yuan felt that the burden that had been pressing on his shoulders these days suddenly became lighter, and he felt much more relaxed. In the past few days, he had used many things to think of incoming refugees, but it was difficult to do it because of the simplicity of the mind.

For example, the Wenchuan earthquake in 2008 was the slogan at that time, "One side will have trouble, all sides will support it." There were countless materials transported from all over the country, but it relied on the convenient transportation environment of later generations. In the Tang Dynasty, the possibility of this was very small. One of the reasons why Yang Guang built the Grand Canal was to solve the transportation problem of north and south. However, even if there was the Grand Canal, the journey from Luoyang to Chang'an was mainly based on land transportation.

The characteristic of land transportation is that it is very slow and it consumes a lot of manpower and material resources. For example, when transporting from Luoyang to Chang'an to Sanshi of grain, perhaps only one stone of grain will be left when you arrive in Chang'an.

But when Li Yuan said this, not only did he not see any shock on Li Shimin's face, but he was full of suspicion.

"Father, don't spend some fun." Li Shimin couldn't laugh and cried, and looked suspiciously at Li Yuan, asking: "Can you be confused? As the saying goes, increase income and reduce expenditure, the food in Chang'an is a fixed number, so before the food in other places has arrived, Taicang can use this little grain. As for the source of resources, Fang Xuanling and others have always been reliable, and there were precedents in the past disaster relief... Father, what can you do to save the 200,000 refugees? I can only do my best to prevent more people from starving to death."

Li Yuan hummed disdainfully, his face remained unchanged. On the table table facing the wall to the east of the warm cabinet, there was a brocade box, which was about half an arm long and about the width of an adult's palm. With a "click" sound, there was no rare treasure inside. Instead, it was a piece of paper, which used extremely fine ink lines to outline a pattern similar to the rails in later generations. On the rails, it was not a train with a hot steam, but a four-wheeled carriage pulled by several horses.

"What... is this? The painting is so exquisite, it is even more vivid and lifelike than Yan Lide (Yan Liben's brother), the Minister of Works, and these horses appear vividly. The neighing sounds seem to be ringing in his ears. Every silk thread is also drawn by the reins held by the driver's hand..." Li Shimin touched the thin paper, couldn't put it down, and said in amazement.

"Nonsense, this is a photo, how can it be realistic!" Li Yuan rolled his eyes and despised Li Shimin, an ancient man who had lived for a thousand years. If he saw the illustration of Jin Pingmei under the bed, wouldn't he be...

This railway photo is nothing else, but the photo included in the appendix in "On the 1935-1942 US Economic Crisis" purchased by Li Yuan. As for why there were already steam trains in the United States in the 1940s, but the appendix was a photo of a four-wheeled carriage galloping on the railway, Li Yuan also felt strange.

"By the way, Father, what exactly is this painting?" Li Shimin couldn't put it down and rubbed it with his hands. The smooth surface of the photo looked like greasy paper, which seemed very novel in his opinion. Yan Lide and his younger brother Yan Liben's paintings can only be appreciated, but cannot be used to touch them frequently. This is undoubtedly a flaw in the eyes of Li Shimin who is a literary and teenager.

"The carriage in the painting is called a four-wheeled carriage, but that is not the key. This is a railway track, and the wheels of the carriage are intertwined with the railway track. Wouldn't the carriage be on the ground when driving on it?" Li Yuan pointed to the thing in the photo to explain to Li Shimin, thought for a while and said, "Shimin, do you know the corridor for transporting grain in the Qin Dynasty?"

Li Shimin was stunned and then said, "In the original chronicle of the First Emperor in "Records of the Grand Historian", it is written that the road from the temple to Li Mountain, the front hall of Ganquan, and the corridor is built, and it belongs to Xianyang."

The corridor refers to the passage with a roof between buildings.

The corridor during the Qin Dynasty was to build earth walls on both sides of the grain transport route, which played an important role in the battle to destroy Chu. The Chu army led by Xiang Yan could not figure out where the grain transport troops in the corridor were, and completely fell below in the confrontation with Qin.

"Isn't the Qin Dynasty corridor similar to this railway? Building railway tracks and allowing four-wheeled carriages to pass quickly can save the time spent transporting grain. How can 200,000 refugees not be saved?" Li Yuan smiled and said.

Li Yuan laid the photos of the railway on the table and carefully talked to Li Shimin about the various uses of the railway, as well as the difficulty of construction, cost issues, etc.

"What a wonderful thing! What a wonderful thing!" Li Shimin clapped his legs and laughed, and turned around in the warm pavilion of Da'an Palace. The excitement between his eyebrows was obviously unable to control himself.

From then on, if natural disasters occurred in the Tang Dynasty again, relying on the convenient railway transportation, fewer people would starve to death than the previous dynasty. This is a great good policy.

This move will last forever and benefit the present, and there is no need to worry about the same tragic ending as Yang Guang. How much money can it cost to build a railway? It is obviously more cost-effective than digging the canal from Yangzhou to Youzhou, and also save people's strength.

Now, as long as the railway from Luoyang to Chang'an is built, the 200,000 refugees can be properly arranged. At that time, Li Shimin's throne will be as stable as Mount Tai with the support of this group of people.

As for Li Yuan's role, Li Shimin completely ignored it. As long as he, Li Shimin, did not mention it himself, who would know that this railway policy was proposed by the Supreme Emperor who lived in the deep palace!

"Although the railway laying requires copper and iron, it only covers a layer of leather on the surface and uses wood in other places..." Li Shimin muttered.

According to the father, the best use of iron on railways, but he firmly denied it. The iron production in the Tang Dynasty was extremely low in one year, and it might not be enough to use it all on railways.

Moreover, good steel should be used on the edge. Although the food problem of 200,000 refugees was very urgent for the Tang Dynasty, the Turks in the north of Mo were even more urgent.

Jie Li Khan could raise 100,000 Turkic cavalry to go south at any time. If it weren't for his usual great military achievements and his reputation in the northern border, the Tang Dynasty would not have had the Weishui Alliance scared away the Turks. He could only move to Jinling as frustrated as the Jin Dynasty back then, and the north once again became a pasture for nomadic peoples.

So although Li Shimin did not refute Li Yuan, he had already thought of using inferior products as good ones and using wooden tracks instead of rails. The rest of the bedding work was handed over to the Ministry of Works...

"But...Now the northern part of Guanzhong is just in chaos, the world is just settled, and the people are still in peace. If they are collecting corvee labor..." Li Shimin's smile suddenly stopped, and instead he was filled with a faint sadness.

It is a fact that the cost of building a railway is much lighter than that of the Grand Canal, but the current nine years of Wude cannot compare to the Daye period of the Sui Dynasty, let alone Guanzhong, which had just experienced military disasters!

When prosperity occurs, the people suffer; when death occurs, the people suffer.

Although Li Shimin didn't know Zhang Yanghao's Yuan song, he didn't know that the line "The palaces are all made of earth" also refers to the Tai Chi Palace and the Daming Palace he built.

But his understanding of the eight words is beyond ordinary people's ability, otherwise he would not have had four years of rest and recuperation before launching the battle against the Turks in the fourth year of Zhenguan.
Chapter completed!