The Hetao Plain was later called Jiangnan on the Saishang by later generations because the Yellow River split into two rivers when it entered the Hetao Plain, a southern river and a northern river. The silt carried by the Yellow River deposited this area into a plain with fertile land.
Today's Hetao Plain does not meet the standards of the Jiangnan Plain. Liu Tan has always believed that it was because the plain was formed too recently, the land was not fertile enough, and it was also caused by soil erosion. Now it seems... there are more reasons than just those.
Liu Tan pulled Huo Guang aside and asked, "At least the Northern Border Kingdom has an abundant water system in the Hetao area. Why does it need to rely on rainfall?"
If it relies on rainfall, the Northern Territory will be in trouble. Not to mention the Hetao area, the entire Northern Territory has very little rainfall.
Huo Guang said expressionlessly, "Yellow River? It's good enough if the Yellow River doesn't change its course so often."
Liu Tan: ???
He knew that the Yellow River frequently changed its course. Although people always praised the Yellow River as the mother river, the mother's temper was really not very good. As far as Liu Tan knew, the Yellow River had changed its course at least eight times in later generations and had even taken over the course of the Huai River.
Every time the Yellow River changes its course, a large number of people die in floods and even more are displaced.
Therefore, water control has been the main theme of this land since ancient times.
But the problem was that in his understanding, the frequent changes in the course of the Yellow River occurred in the area from the North China Plain to the estuary, and each time it changed course, it bypassed the State of Qi because of the existence of Mount Tai. Therefore, the State of Qi and the State of Changyi could be regarded as the top fiefdoms of the Han Dynasty.
As for the Hetao area, he had the impression that the route was not often changed.
Seeing Liu Tan's puzzled expression, Huo Guang simply had a map brought over. Pointing to some lakes on the map, he said, "Your Highness, look, this area, from Zhangye to Shuofang, is full of these lakes. The locals call them oxbow lakes."
Liu Tan nodded: "Yes, tell me how there is a shortage of water when there are so many lakes."
Huo Guang asked in return, "Your Highness, do you know what an oxbow lake is?"
Liu Tan:...I'm sorry, geography has been returned to the geography teachers for many years.
Huo Guang didn't seem to expect him to know, and explained, "I only recently learned that the Oxbow Lake was formed because the Yellow River changed its course. The river originally curved here, and after the Yellow River changed its course, a large amount of water was retained here, forming a lake. There is indeed no shortage of water around the lake, but no one knows when the Yellow River will change its course again."
Liu Tan looked at the large and small oxbow lakes on the map and felt a little dizzy. If oxbow lakes were formed in this way, then how many times had the Yellow River changed its course in the Hetao area?
Although such frequent route changes did not cause huge casualties like in the North China Plain, the losses were still considerable. Moreover, this place was at the forefront of the battle against the Huns, with not many people, so naturally it would not attract too much attention.
Liu Tan looked at the area where the Nanhe and Beihe rivers now flowed on the map and suddenly said, "I want to walk through it."
Huo Guang was stunned for a moment: "What?"
Liu Tan said, "I want to walk along these two rivers."
Huo Guang hesitated: "This... Your Highness doesn't have to..."
Liu Tan shook his head and said, "Without seeing it for ourselves, there's no way to be certain of the situation. The water system in Shuofang is so well developed, yet the harvest is still poor. This doesn't make sense."
Huo Guang stared at him and asked, "Your Highness, will you find a solution if you go through it once?"
Liu Tan said seriously, looking at the map, "It's hard to say. I don't know which one is suitable."
Huo Guang: ???
At this point, Huo Guang really wanted to ask him: Where are you from?
Does this make sense? I don't know which one is right. So there are multiple approaches?
Liu Tan did have many methods in his mind. After all, the history of the Flower Planting Family was basically a history of struggle with the Yellow River. They had fought with this river too many times over thousands of years. Although some methods seemed very backward, they might be the most suitable for the current Shuofang.
After all, the level of science and technology is not up to par, so even if Liu Tan wants to build the Three Gorges Dam, he will not be able to succeed.
Since it concerns people's livelihood, Liu Tan can basically leave whenever he wants. After all, he doesn't have to pack his luggage himself, because there will always be someone to bring him what he needs.
Originally he wanted to travel light, but this proposal was rejected by Huo Guang.
Not only that, he even let Liu Tan take the army away.
Huo Guang was saying, "The Xiongnu are still determined to plunder. Even if they actively request trade, it doesn't mean they won't come south to plunder. The weather is getting colder, and the Xiongnu's most difficult winter is about to arrive. We must always be careful."
The fundamental reason why Huo Guang did not stop Liu Tan this time was that Liu Tan went out to do serious business, but it did not mean that he was not worried.
Liu Tan thought about it and it made sense. What if the Huns got any news and Wu Shilu got excited and attacked again, wouldn't he be just adding to the food?
He turned around and called Wei Deng over and said, "Let the elite group come with me."
Wei Deng's eyes suddenly lit up: "Your Highness, are you going to fight the Huns?"
Liu Tan slapped him on the back of the head expressionlessly. "What nonsense! Where did the Xiongnu come from? The elite regiment has been training in seclusion for a long time. It's time to go out and get some fresh air. If they pass, they'll enter the next stage of training."
Wei Deng was stunned for a moment: "There is a next stage?"
He was a little surprised, thinking that physical training was a long-term career. He just needed to train his physical fitness and improve his martial arts skills. But according to his prince, this seemed to be the end yet?
Liu Tanxin said, "This is just the beginning. If I don't create a Zhurihe for you, wouldn't my journey through time be in vain?"
But he didn't reveal too much to Wei Deng. No matter how much he said now, they might not understand. Let's talk about it when he comes back.
Wei Deng was a little frightened by Liu Tan's meaningful smile. He thought for a long time but couldn't figure out what else they had missed. In the end, he had to put the matter aside and notify everyone to prepare to go on tour with His Royal Highness the King of the North.
The elite group was almost crazy with joy when they heard the news.
God knows how boring it is for them to be cooped up here training every day. Many people thought before coming here that they must stay here, because after staying here they will not have to worry about food and clothing.
But people are never satisfied. Now they not only have no worries about food and clothing, but also have extra money to support their families. However, training like this every day is really too boring, even more boring than farming at home.
Everyone came to the selection with great enthusiasm, and did not complain no matter how hard or tiring the training was, just for the chance to fight the Huns.
As a result, they felt that they were almost there, so they negotiated with the Huns.
The same question was asked between the soldier and Wei Deng. Wei Deng imitated Liu Tan and patted the man on the back of the head, and even the reply was the same.
Although the elite group was a little disappointed, they were still excited at the thought of being able to go out and get some fresh air.
Before leaving, Wei Deng specifically reminded us to show the results of our daily training. If nothing else, lining up, marching in step, and running can all be demonstrated, right?
There are also horses. They have been training with them for quite a while, and basically the horses can obey orders as long as they are not frightened.
So in order to ensure that they did not let down, Wei Deng gave everyone, including the horses, some extra training before leaving.
The results were very good. Liu Tan had already made the armor they would wear. They didn't need to wear it during training on weekdays. Now it was the first time they put on the black armor and walked out neatly. They looked very imposing when they lined up on the street.
On the day of departure, Liu Tan also wore a simple black and red outfit. In order to prevent it from looking too monotonous, the clothes were specially embroidered with gold thread patterns on the cuffs and collar.
Huo Guang and others who came to see them off were shocked for a moment when they saw the cavalry standing there in an orderly manner, leading their horses, and neither the people nor the horses moved at all.
When Liu Tan came out, he had a sense of momentum with his hand on the sword at his waist.
It seemed as if even the Huns were no match for this team.
However, it is not easy to gather such momentum, but it is very easy to destroy it.
As soon as Liu Tan stepped onto the bike with his right foot, he felt his left foot sink and he was almost pulled down. When he turned around, he saw a black and white ball hugging his legs and looking at him pitifully.
Liu Tan: ...
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