As we all know, Shanhaiguan and the terrain near it are called the first pass in the world. Pen & Fun & Pavilion www.biquge.info

First, in terms of geographical location, it is the first pass at the eastern starting point of the Great Wall. Then from the geographical situation, it is close to the sea by the mountains, and the Xiongguan is locked, which is easy to defend and difficult to attack. Shanhaiguan, the eastern starting point of the Great Wall, has become the representative title of "Guan" since the Ming and Qing dynasties, especially in modern history!

Between the mountains and the sea 7.5 kilometers apart, the Great Wall runs through the north and south, and the Shanhaiguan City is close to the pass. In addition, there is a mountain in the east, which is a natural barrier, and the stone river in the west becomes a natural moat, thus constituting a veritable strategic location.

The source of the Great Wall is called the old dragon's head, and half of the old dragon's head is in the sea.

Look beyond Shanhaiguan and the nearby terrain.

In the northeast, the Great Khing'an Mountains stretch from south to north, followed by the Qilaotu Mountain, Nurul Tiger Mountain and Yan Mountain, which are a continuous mountain range that separates the Northeast Plain from the North China Plain and the Mongolian Plateau, forming three basically independent geographical units.

All of the nearby terrain runs along the river valley.

If some people want to, forcibly shuttling between the lofty mountains and mountains in the mountains of western Liaoning, the difficulty of the road can be imagined. It's almost nine deaths!

In general, people have the impression that only a few kilometers high mountains will be covered with snow all year round.

But not necessarily!

The height of the snow cover is mainly determined by air temperature, precipitation and topographic conditions.

In western China, from the Qinghai-Tibet Plateau and the Kunlun Mountains to the north to the Tianshan Mountains and the Altai Mountains, the height of the snow line decreases from 6000 meters to 5500 meters, 3900~4100 meters and 2600~2900 meters. Further north to the Arctic, the snow line drops to sea level.

That is, because of the special geographical location.

The mountains near Shanhaiguan are not very high, even if they are only about a kilometer high, they are prone to perennial snow on them. Form a continuous group of snow-capped mountains!

At that time, the Red Army's 25,000 Long March was not a mountain, but it was all snow-capped mountains. The danger is only individual!

But in the distance of Shanhaiguan, there are mountains with snow-capped mountains and snow-capped mountains.

Don't talk about the indigenous army of the DPRK, even if it is the Zhu family's army, to be honest, Zhu Zilong has no confidence that he can hardly climb these snow-capped mountains, and after he comes out, the army will not suffer three or four percent casualties.

However, at this moment, in the old forest of the snow-capped mountains outside the vast mountain pass, there is a continuous army marching here.

Dolgon was really ruined, and Jingran really chose such a path of no return.

As far as the eye can see, there are endless mountains and mountains, and this unchanging white barren scenery is not just very boring to watch.

It's terrible!

Just halfway up the mountain, the wind began to pick up on the mountain.

The cold wind was howling, and the grass branches were withered, like autumn. Further up, the sun is gone, the snow is fluttering, the mountains are silvery white, and the snow is not known how thick it is, as if it has entered winter in advance.

The mountains are uneven, there are many snow caves, and if you are not careful, it will be difficult to rescue you if you fall into the snow cave.

From time to time, there were unlucky Qing soldiers, who stepped on their feet, and then there was no more. The man is gone!

When I was about to reach the top of the mountain, the clouds fell at some point. The snow was heavier, mixed with hail as big as plums. There were no trees or grass on the mountain, and the snow pierced people's eyes...... The higher you go, the more uncomfortable it becomes!

Many Qing soldiers felt dizzy, had difficulty breathing, weakened their bodies, and felt nauseous and wanted to vomit. Some people wanted to sit down and take a rest, and the experienced Dai Shan shouted on the spot: "No matter how tired you are, you can't sit down, you can't get up if you sit down, walk through this mountain, and go to the foot of another mountain, the buffer zone between the mountains, and you can rest!" ”

Everyone was tired and sweaty and panting like cattle, but as soon as the sweat beads came out of the body, they immediately formed a Xiaoice mist.

Then there was one cold and one hot, which made people can't help but fight a cold war.

Because of excessive fatigue, as well as cold. And some loose Qing army columns, along the very unfamiliar winding mountain roads, walked in the snow one foot deep and one foot shallow. Make the monotonous noise of Kerakara!

During the drowsy journey, the air is thinner when you climb to the top of the mountain!

The wind on the mountain, hissing and screaming, rolled up the snow on the ground and mixed it with the snow that was falling in the sky, like waves in the sea, whirlpooling and whirlpooling.

Since most of the Qing soldiers, let alone cotton clothes, even leather armor is not available to everyone.

The snow hit their faces and bodies like iron sand. It was as if he was carrying a large wine basket on his head, his head was heavy, his feet were light, and his body was shaking.

Dai Shan himself was also a little physically exhausted, but at this time, he tried his best to shout: "Listen to me, if you want to live, go well!" You can't sit down, and if you sit down, you will become an immortal in this 'kingdom of heaven'. That's going to see the Immortal Heaven in advance! ”

But even then, there were only a few thousand people along the way, who fell on the snow and could no longer get up.

The remnants of the people, no one dared to stop, and they went down crookedly. The descent is much faster, and many people are sliding down the slopes with very thick snow one after another, and they are dozens of feet away.

Of course, the unlucky ones are still countless.

From time to time, there was a sudden "bang" shock, and then a large pile of messy earth, rocks, snow, grass and wood ash collapsed. These are the debris that keeps the snow under you!

A few glances back at the subordinates who were advancing like the walking dead. Dolgon's heart was really full of flavors, and it was really unspeakably uncomfortable.

Finally came to the foot of the first snowy mountain, and when he counted the number of people, Dorgon was startled again.

Just after walking through the first snow-capped mountain, the army of more than 80,000 people was a full 5,000 people less.

This casualty ratio is too large!

However, when you think about it, it is normal.

At the beginning, because everyone was not very accustomed to this terrain, and they went up the mountain in a hurry, they would naturally eliminate the first batch and the largest group of people.

This is like the audition extras, the elimination rate of the preliminary round is always the most amazing.

And when most people adapt to the terrain of the snowy mountains, the elimination rate will still be there, but it will not be as scary as the first time.

However, it is clear that another situation that suddenly appeared was a headache for Dorgon.

That's the drunken oxygen reaction!

Drunken oxygen is due to the fact that the human body has just adapted to the low-oxygen environment in the plateau area, and when it re-enters the area with relatively high oxygen content, it will be uncomfortable again, resulting in fatigue, weakness, drowsiness, chest tightness, dizziness, diarrhea and other symptoms, which will produce a so-called "deadaptation reaction" or "hypogenogen reaction".

In medicine, it is also commonly known as "drunken oxygen disease".

Dolgon had no choice but to let the army rest for a day or two under the snow-capped mountains, in a small grove.

In this kind of place, perhaps the only commendable advantage is that there is no longer any need to worry about the encirclement of the Ming army, right?

Dolgon thought to himself, laughing at himself.

------- (To be continued.) )