In early summer, the Great Wall is full of new green and fragrant spring, and the greenery is full of drunkenness, carrying a wisp of fresh breeze and cool breeze.

The three old men climbed up all the way without stumbling, but they were really a little tired, they were old in the end, and they didn't pay attention to it, so they sat directly on the steps to rest.

Gan Liangsheng took out beef jerky from his backpack and handed it to Xiao Wanquandao, "Replenish your strength." ”

Xiao Wanquan held a paper bag in his hand and handed it to Xiao Shunmei and Chu Meiqin, asking them to take it and eat it.

Xia Jingshu and Gan Liangsheng stood by the wall and looked at the eyes full of dripping green, lofty mountains and mountains, it was really easy to have pride in their chests.

Xia Jingshu said heroically, "It will be the top of the mountain, and you can see the mountains at a glance." ”

Gan Liangsheng looked at her in surprise, Xia Jingshu raised her eyebrows and chuckled, "How can a little girl, you can't have a heroic side." ”

"Yes, yes." The corners of Gan Liangsheng's lips hooked up a smile as light as the moon, don't look at her soft-spoken, gentle as water, but her heart is tougher than that of a man, otherwise she would not have lasted so many years.

Xia Jingshu sighed lightly and said, "The Great Wall of China is empty, and it can't stop the iron cavalry from going south, and it can't stop the guns of the Western powers. "You see it's not high." ”

"You can't say that." Gan Liangsheng said in a deep voice, "In the era of cold weapons, if there are no fortifications, then in the face of cavalry, you can only resist with flesh and blood. Historically, except for a few strong soldiers, most of them did not have this quality. So don't question the significance of the Great Wall, of course they are useful, otherwise you will go crazy to fix this. As for why it's only so high? It's very expensive to repair this thing, and the emperor said that I will quietly build a few palaces for beautiful girls, and how good it is to be drunk and dream of death! If it weren't for the barbarians who coveted the prosperity of the Central Plains, who would repair these broken things...... Expensive. ”

"Hehe......" Xia Jingshu laughed amused by his witty language.

"What are you laughing at? What's so funny. Xiao Shunmei muttered quietly.

"Listen a little, you can learn a lot." Xiao Wanquan said.

"What's the use of learning this!" Xiao Shunmei said disapprerovingly.

"Go back and show off!" Chu Meiqin suddenly interjected.

"Old woman, you are really telling the truth." Xiao Wanquan said with a smile.

"Test you? What do you think the Great Wall does? Gan Liangsheng leaned on the city wall and said with a smile in his eyes.

"Beacon tower, wolf smoke, early warning!" Xia Jingshu blinked, and said with a smile on the corner of her mouth.

"Uh-huh!" Gan Liangsheng nodded and said, "There is the Great Wall, an artificial barrier erected between the mountains and mountains, where men plough the fields and grow crops, and women spin and weave, get married and have children. The Ox * Lang and Weaver Girls live and work in peace and contentment, but once the war starts, the empire can calmly mobilize and train, and when the nomadic army steps across the Great Wall, they will face a Central Plains army armed to the teeth. In fact, there are almost no people who conquer the Great Wall purely militarily, the Manchu Eight Banners are known as invincible, and in the end they have not to make a detour to Mongolia, with the low combat power of the Ming army, Wu Sangui does not surrender, or can only look at the city and sigh.

In fact, the Great Wall is not only a lonely Great Wall, the periphery of the Great Wall, there are a series of strongholds, the "Hanshu Geographical Chronicles" records that the north out of the stone gate barrier to get Guanglu City, and the northwest to get the city, and the northwest to get the head of the city, and the northwest to get the Huhe City, and the west to get the city of Sulu. Usually these strongholds are used for early warning, and the stronger the dynasty, the more strongholds there are on these periphery, and when the dynasty is relatively weak, the fewer they are.

The size of the Great Wall ensured that the cavalry could not break through, and if they wanted to pass, they would have to wait for the Central Plains to decline and not be able to maintain the garrison on the front line of the Great Wall, otherwise the defenders would only need to stand on the wall and throw arrows and stones at the position where the nomads had assembled to break through.

In the era of cold weapons, the infantry was always defeated in the face of the cavalry frenzy, and if the Central Plains Dynasty did not have the Great Wall, they would face war horses coming and going freely from the Mongolian Plateau and the northern shore of the Bohai Sea. This man-made natural danger has hardly been breached head-on, and this wall has blocked generations of heroes on the steppe for thousands of years, and each generation of steppe civilization that can threaten the defense line of the Great Wall is enough to dominate Central Asia, and even trample on Central and Eastern Europe and drink the Mediterranean. ”

"The Great Wall also functions as a blockade." Gan Liangsheng said eloquently, "The production mode of the nomads determines that their harvest is very unstable, and at the same time, due to the backwardness of science and technology, they almost do not know how to mine, and the iron pot has to rely on the mutual market with the Central Plains Dynasty, not to mention the sword and arrowhead, the Mongols were driven back to the grassland by the Ming Dynasty, and in less than 30 years, they were reduced to the point of using animal bones to make arrowheads, not to mention fighting, it is difficult to live."

More importantly, the Great Wall, as the dividing line between farming and farming and animal husbandry civilizations, is no longer reckless for the nomads who cross the Great Wall. For example, the Xiongnu Turks were just a large tribe and did not pose a threat. Outside the Great Wall, even if they control 300,000 strings, they are only a group of herdsmen, and at most they only have the advantage of cavalry. Once the Great Wall is crossed, the nomads will become the steppe empire, and they can use the craftsmen, technology, military equipment and engineering capabilities of the agricultural civilization will be greatly improved, and the production of nomadic military + farming is simply an almost invincible existence in the era of cold weapons, the Mongols swept through Asia and Europe, and it was already destined from Shi Jingjiao's cutting of the sixteen states of Youyun, even if there were no Mongols, there would be other nationalities to complete this conquest. Therefore, the Great Wall is a safety valve, which can control the danger of the outbreak of the largest nomadic center in Eurasia within a safe range. ”

Xia Jingshu's glittering and adoring gaze made Gan Liangsheng excited, "The existence of the Great Wall has greatly increased the fault tolerance rate of the Central Plains Dynasty. Han Gaozu had the siege of Baideng, but it was outside the Great Wall, and if you don't accept you to attack the Great Wall, the Huns have almost no engineering ability. After Han Gaozu came back, he recuperated, and three generations worked hard until Emperor Wu of the Han Dynasty took away the Xiongnu in waves. There is the Great Wall, in the face of nomads, you can defeat militarily, you can be politically incompetent, you can be diplomatically retarded, you have enough time to make mistakes, and you have enough time to correct them.

The Northern Song Dynasty, which did not have the Great Wall, often maintained 300,000 troops in Hebei, and could only rely on Hebei's water network to build a defensive line. The huge pressure on national defense made the Northern Song Dynasty have to maintain a standing army of one million and levy high taxes on the country. Even so, in the face of the Liao people going south, they could only accept New Year's coins, and the Jin people crossed the river and were almost taken away by a wave. It can be seen that this line of defense is far worse than the Great Wall. ”

"Is it all over? When you're done, you can take pictures! Xiao Shunmei stood up and patted her buttocks and said, what is it really showing, haven't you ever read a book? The girl's admiration is so unproductive, which makes her angry outward, and it's not that she hasn't read a book, as for looking at him so directly and unabashedly!

"Take a picture, take a picture." Gan Liangsheng said in a good way.

Xia Jingshu immediately took out the camera from her bag, "There is also an umbrella here, my brother and sister are really well prepared." ”

"It's not raining, what are you doing with an umbrella?" Chu Meiqin said.

"Shade! There is no green shade on this Great Wall, you see the sun shining directly, it is hot. Xia Jingshu took out the folded light blue floral umbrella, opened it directly and propped it on Xiao Shunmei's head.

"No, no, the sun doesn't hurt it, and the sun in the field is much more poisonous than this when the wheat is harvested. It's not a squeamish little girl, put it away. Xiao Shunmei pushed the umbrella and stood up, "Let's take pictures." ”

Xia Jingshu looked at Chu Meiqin and said, "Concubine." ”

"I don't need it either." Chu Meiqin waved her hand.

"I don't need a man anymore." Xiao Wanquan laughed and said, "Let's stand up and take pictures." "One left and one right pulled his wife and sister, "Jingshu, hurry up." ”

The four men quickly stood in a line, their hands on the walls.

Gan Liangsheng held the camera in focus, walked backwards, and leaned against the city wall on the other side.

"Come and get me?"

"I can't catch it!"

At this time, two children, a boy and a girl, six or seven years old, ran up and down.

Gan Liangsheng was about to press the shutter, and the two children passed through the lens, and they had to wait patiently.

"Hey, don't run ......"

"I can't catch it, I can't catch it!"

The little boy went up and pulled the little girl's braids, "It hurts!" Let go, let go. The little girl was so anxious that she screamed, "I'm going to tell my mother to beat you." ”

Gan Liangsheng's face was gloomy, his temples were noisy, and he was just about to speak, Xia Jingshu shouted, "Liangsheng, hurry up!" ”

"Hurry up, this cheek is about to laugh." Xiao Shunmei urged.

"Oh! Good. The aftermath of Gan Liangsheng's eyes glanced at the child running downward, and quickly pinched the shutter.

There are also the voices of children running around, "Don't run! I'm going to hit you! ”

"Stupid, can't catch it, can't catch ......" The little boy turned around and stuck out his tongue at her, grimacing.

"Come back soon, both of you." The child's mother beckoned, "Hurry up and eat." ”

"Yay!" The two children ran over to their mother and said, "I want to eat bananas." The little boy grabbed his mother's bag.

The little girl reached out and groped directly in her bag, "I want to eat eggs." ”

The child's father said, "Give me bread." ”

The family sat down on the steps and feasted.

While their family was eating and drinking, Gan Liangsheng endured to take pictures of everyone one by one, group photos and solo photos.

"You go and take a picture with Jingshu." Xiao Wanquan beckoned.

"Okay!" Gan Liangsheng said eagerly.

"Big brother, do you know how to take pictures?" Xiao Shunmei immediately said, looking very unwilling, knowing that I haven't spit out yet, what's the matter with letting them stand together and take pictures?

"It's easy for me to look at it, is it good for Liangsheng to come and teach me?" Xiao Wanquan said enthusiastically.

Gan Liangsheng hurriedly walked to Xiao Wanquan's side and taught him how to look and how to pinch the shutter.

"Just stand here." Gan Liangsheng's good focus was handed over to Xiao Wanquan.

Walked quickly to Xia Jingshu, who was already standing, and was standing behind her just now.

Xiao Shunmei's eyes were like searchlights, staring at them, and when she saw this, she hurriedly said, "What are you doing standing so close?" Far away, far away. He gestured with his hands outward, "Spread out, like you're holding her from behind." ”