Wu Kun talked a lot, from the Three Kingdoms at the end of the Han Dynasty, to the killing of Hu Ling, to Emperor Wu's destruction of Buddha, a lot of secrets erupted from the Boom, making everyone drowsy.

Yang Shuang's history is not good, he has been crawling and rolling on the border for more than ten years, and his knowledge has long been returned to the history teacher.

The cognition of recent centuries only stays in the movies and television watched after retirement, such as the fierce generals of the Three Kingdoms, the heroes of the Sui and Tang dynasties, the controversial Ran Min Emperor, Xie An in the Battle of Weishui, Liu Yu who embezzled thousands of miles like a tiger, and Chen Qingzhi in the white robe.

If you have to pick out a few more people, I don't know if Zhang Lihua, Chen Huier, Xiao Meiniang, the eldest grandson Wuji, and Zhang Chuchen count.

But he knew that even if there was a quicksand river, this would not be a journey to the west, because further west, there would be no Flaming Mountain, no Lion Camel Country, no Daughter Country, and so on.

In the era of the information explosion in later generations, there are so many natural wonders, and there is no shortage of quicksand.

After confirming that it was the quicksand river, Yang Shuang felt that he had won the jackpot!

Quicksand, which is usually made up of sand or clay soaked in water and salt.

To put it simply, it is the product of liquefaction of solids!

As for how rivers are formed, it should be related to the movement of the earth's crust.

Yang Shuang will not be idle to study the reason for its birth, but cares about its components!

Inside, there will be no salt!

I heard that during the Great Ice Age, the Western Regions was the sea!

When the sea disappears, it inevitably leaves behind a lump of salt.

The movement of the earth's crust to carry groundwater to the surface and merge into the yellow sand to form quicksand will also melt the salt and bring it up?

Yang Shuang was excited.

Salt is a rarity in Dasui, even if it is roast mutton, it can't be wiped casually!

And, the most important thing is that the salt provided by the army is not the edible salt that is as white as snow in later generations, but the big pimple that is yellow and gray, and it tastes bitter and astringent.

If this coarse salt is processed, half of the refined salt can be extracted.

Now, God seems to have sent a river of salt sand!

Although it is illegal to make salt, the emperor is far away, and his soldiers are all horse thieves, so he doesn't care what he does!

Salt making!

It must still be white as snow, sold to the countries of the Western Regions, Sassanid Persia and Eastern Rome, so that caravans can explore the way, draw maps, and then religious and cultural invasions, the collision and friction of several great dynasties between the East and the West, the westward conquest of bald armies, and unequal agreements·······

"Big brother, why are you drooling?"

"Huh? Oh, it's okay, hungry, go get me some food! ”

Outside the city gate, the wind roared, and the black sandstorm continued to strengthen.

A few men were worried about the six hundred war horses they had taken from the Turks, as well as a lot of forage and jerky, so they ran out to work.

Yang Shuang listed crude salt purification methods such as brine purification and sediment separation, and then drilled into the gray space.

The day before yesterday, the battle was very fruitful, and almost all the generals and generals who lived in Canghe City were stoned to death, and the soul of the soldiers obtained after decomposition alone was 60, not counting the results of killing ordinary soldiers.

Spaces the size of football fields are becoming more crowded as buildings and farmland continue to grow. The dense soul of soldiers walked among them, and there was almost no place to stay.

Yang Shuang roughly counted, 135!

You can build two bunkers, or you can convert them all into archers, form a military formation, and see the dignity of "ten thousand arrows at once".

Soldiers, or buildings?

Choosing one of the two, Yang Shuang was a little entangled, pulled the list of buildings, and looked at the introduction again.

Bunker: Fifty soldier souls are required for exchange, fifty crossbow soldiers are brought, and the range of activity is limited to fifty miles.

Two bunkers can meet the minimum number of people required for "Ten Thousand Arrows to Fire at the Same Time", although there is a limit on the range of movement, and it is not possible to convert the type of soldier soul, but now it seems to be the best choice for him.

Yumen Pass needs fortifications, and without the city gate tower, there is no lookout function.

You can build two gates at once, and where will the other one be placed?

Is it really necessary to build the Yumen Pass into a closed city, divided into the east gate and the west gate?

It seems that the residential area needs to be re-planned.

Back to reality, Yang Shuang was just about to go out for a walk, but saw the grizzled Wu Kun running in a hurry.

"What's going on?"

"There are a few Dunhuang sentry riders who got lost because of the wind, and they were lucky to touch us, listen to them, all the personnel of Dunhuang retreated to Zhangye County, the hinterland of Liangzhou!"

"What?" Yang Shuang was shocked, "Did the Turks withdraw their troops?" ”

"The troops were withdrawn as early as three days ago!"

"With a complete victory, how can it be possible to abandon Dunhuang? Could it be that the Black King Eight was accidentally killed by an arrow? ”

Wu Kun shook his head, "No, the Dunhuang garrison lord has gone deep into the lonely army, burned countless Turkic baggage, shocked back 100,000 soldiers, and promoted the official to two levels. ”

"Then he retreats a soldier with a yarn? The official is getting bigger and bigger, but the courage is getting more and more cowardly? Yang Shuang was anxious.

He can't help but be in a hurry, if Dunhuang is empty of troops, Yumen Pass will cut off the connection with the Central Plains, and go east for 1,500 miles, no longer the land of the Great Sui, and his team will become a lone army!

"The Turkic Great Khan Sha Boliu, led 200,000 troops south, Liangzhou has lost most of it, and the remaining troops are gathered in Zhangye County and Weiwu County, relying on the Great Wall on both sides of Longshou Mountain, desperately resisting! In addition, it is said that several important towns on the Hetao Plain have also been lost, and the main Turkic force of 30,000 is approaching Hanoi. Wu Kun's words were full of worry.

Hearing the withdrawal of Dunhuang troops, Yang Shuang was too lazy to pay attention to the news behind.

As soon as the Black King is gone, he will be in a difficult situation in the future.

Just now, he was still thinking about how to borrow some food from the Black King!

Although a lot of materials were stolen from the Turks, Yumen Pass, which had no land to grow and no livestock to raise, was empty after all.

The consumption of more than 1,000 people is not a small number, according to Wu Kun's calculations before, it will not last for half a month, and it will face a food crisis.

Yang Shuang had a headache, "Or, let's go too?" ”

Wu Kun shook his head, "The wind is too strong, and there are too many people." And, big brother, you are Guan Cheng now, and you can't abandon Guan without a military order from the Wei Mansion! ”

Yang Shuang didn't have the intention of leaving at all, he was reluctant to throw away the building that cost the soul of the soldier, and when he said he left, he just complained.

"The wind has stopped!"

"Dangdang······ Dangdang ······"

Just as the two of them were frowning and thinking about a good plan, the bell on the city wall to lift the alarm suddenly rang.

The two of them quickly walked out of the city gate hole.

Outside, it was still dark, and the sun, which had been suffocating for a long time, had moved to the west, and it was about to sink to the horizon.

The ravaged earth is covered with a layer of dust and sand, touched by the wind, and the ravines and ravines are not spectacular.

The original rumbling quicksand river disappeared, and in its place, a sand mountain hundreds of meters high!

Hearing the sound of the bell, everyone walked out of the house, saw this wonder, marveled again and again, and even prostrated on the ground, bowing and worshipping.

Even in the future, Yang Shuang has never experienced such a strange thing.

Seeing that Shashan was about a kilometer away from Yumen Pass, he rode on the donkey that ran out to breathe, and rushed forward with a horsewhip.

Before he arrived at the bottom of the mountain, Yang Shuang shouted excitedly, "Salt! It's really salty!! ”