In the last years of the Northern and Southern Dynasties, the Northern Zhou army repeatedly marched east from Tongguan to the Central Plains and defeated the Northern Qi; In the unification war at the end of the Sui Dynasty, Li Shimin, the king of Qin, personally led a large army east out of Tongguan, defeated the two major forces of Dou Jiande and Wang Shichong, and conquered the east of Kunshan in one fell swoop. Pen, fun, pavilion www. biquge。 infoTongguan is not only a barrier of security for the political forces in Guanzhong, but also a symbol of martial arts.

Therefore, Yang Ke's insight into Tongguan is beyond everyone in the Jin Dynasty, and the changes in Tongguan in the Tang Dynasty, which has not yet arrived, is a living textbook. Tongguan, the westernmost part of the 300-mile Mountains, is followed by the defenseless Guanzhong 800-mile fertile field. If the enemy's footsteps cannot be completely blocked in Tongguan, the entire Guanzhong will fall into war, and Chang'an City, the core of Guanzhong, will naturally not be spared. If it really encounters the situation that Tongguan is broken, the Tang Dynasty can only transfer urgently. The fundamental reason why the Weishui Alliance was regarded as a great shame by Li Shimin was that the alliance under the city made Guanzhong a fish under the attack of the Turkic soldiers. How can you allow others to snore on the side of the couch?!

However, from a purely defensive point of view, the location of Tongguan Pass is not the most suitable location for building a pass in the 300 Li Kun Mountains. The location of the Hangu Pass in the Qin Dynasty can be described as the best defense location: backed by Yuzhou (now Lingbao City, Henan), it was surrounded by mountains and rivers (due to the erosion of the riverbank by the Yellow River, a new road was created, and the Hangu Pass in the Qin Dynasty had lost its role as a pass and could not control the traffic artery). Even the Hanhan Valley Pass in Xin'an is better than Tongguan, which can strive for greater defensive depth for the Guanzhong area, and completely turn the entire Kunshan Mountain into a defensive rear.

However, it is far from enough to see only the "plugged" side of the pass, we should also see the "way" side of the pass. One of the most important tasks at the beginning of the construction of Tongguan was to support Cao Cao's army in the war in Guanzhong in terms of transportation and logistics. During the hundreds of years from the Three Kingdoms to the Northern Dynasties, Tongguan not only completely controlled the land roads, but also controlled the water transportation of the Wei River and the Yellow River.

The existence of Tongguan Guancheng not only guards the land transportation, but also effectively controls the important ferry port of Fenglingdu. Readers who are more familiar with Jin Yong's novel "The Condor Heroes" should not be unfamiliar with "Fenglingdu", which is also famous in history. Gao Huan's attack on Guanzhong used Fenglingdu, and a series of battles between the Northern Zhou and Northern Qi in the southern Jin region relied on Fenglingdu as an important logistics node. Of course, both Tongguan and Fenglingdu played a huge role in the great rebellion at the end of the Sui Dynasty and the unification war of the Tang Dynasty. If we push our gaze to a more distant era, we can find that Qin Mugong, one of the five tyrants of the Spring and Autumn Period, also has an indissoluble bond with Fenglingdu. In the battle of rafting, the location of Fenglingdu was an important transshipment center, and the Qin army also crossed the river in the area of Fenglingdu.

The Grand Canal dug in the Sui and Tang dynasties was very different from today's routes, and its main purpose was to transport supplies to Chang'an. First of all, the materials produced in various parts of the Yangtze River were mobilized to Yangzhou, and after marshalling in Yangzhou, they set off and went north along the canal, passing Suiyang, and then they could go to the Han River or continue north to Bianliang. Generally speaking, it is usually more convenient to take Bianliang for transshipment, and then go westward and store grain materials in Hanjiacang near Luoyang (the first granary in the world at that time). This is also the reason why Emperor Yang of the Sui Dynasty paid more attention to Luoyang, the eastern capital. Later, most of the "eating in Luoyang" during the Wu Zetian period was also for this reason. The materials including Jiacang can be selected by land or water to pass through the land of Kunshan to enter Guanzhong. The materials transported by the Yanhan River were temporarily stored in Hanzhong, and the materials produced in Yizhou in Shu were deployed together across the Qinling Mountains and then transported to Guanzhong. It can be seen that in addition to its military significance, Tongguan also had important political and economic significance for the Tang Empire.

Everyone didn't understand why Yang Ke would leave the court that was just on the rise, and the micro-service light car embarked on the road from Luoyang to Chang'an, and after leaving Luoyang, he traveled all the way, without a moment's stop, and uncharacteristically did not linger at the slightest about the humanities and officials along the way and the people's feelings, but when he arrived at this Tongguan, he said that he wanted to take a good look at this ancient battlefield. I don't understand, but everyone didn't question Yang Ke's decision, but followed him to speed up his pace, and finally entered Tongguan City before the retreat.

After entering the city gate, everyone no longer rode horses, but walked, only to see a line of two rows of shops along the street, most of the doors are two-bay, not wide, but densely packed, the street is not very wide, one of Honggu's subordinates at this time drove forward, said to Honggu: "East, the penultimate at the end is our shop, the small one goes to the front station first?" ”

Honggu nodded: "Arrange the accommodation first." ”

The man answered. Yang Ke smiled and quipped to Honggu: "Liu Dong's business is doing a lot, I didn't expect that there will be your name in Tongguan." ”

"Speaking of the branch of this Tongguan, it all depends on the big cabinet here, it is said that he is still my elder, it turned out that my father saved his life on the business road, and then voluntarily served as a slave, loyal, originally just for his own business in Tongguan to build a place to stay, but in the hands of this big cabinet, in just ten years, it has become a golden signboard in the north and south."

"Oh?" Hearing Honggu's introduction, Yang Ke couldn't help but be a little curious: "This person is not only loyal, but also very capable, I will have to ask for advice later." ”

"What to talk about, the dignified King Yu is eloquent, Bogu is well-versed in the present, but he is just a businessman who does not enter the stream, where do you dare to work and ask." Honggu teased.

Yang Ke knew her temper, and she always spoke straightforwardly, without concealment, and she didn't think it was a pestle, but said seriously: "I'm not joking, it's no accident that this big cabinet can stand in Guanzhong and make a golden signboard." How can a person who is not familiar with the situation of the people and well-informed do a good business? Besides, Shangjia Shangjia, Xing Shang Jia, Zhu Jia, Gu Zhi Fan Li, Lu Buwei, and Zigong are not also businessmen? Who dares to underestimate these ancient sages. I really want to ask this big cabinet about the people of this place. ”

Although Honggu is not like Zhang Rui's poetry and book heirloom, because the family is rich, her father also hired Xixi teachers at home to enlighten the brother and sister, so Honggu is also a person who has read some books, and she still knows the source and allusions for these three people.

Fan Li, originally a native of Chu, was born as a doctor. In the battle of Wu Yuefu Jiao, the Yue Kingdom was defeated. Fan Li offered the king of Yue, and humbled himself to ask for peace. After returning to China, he assisted the king of Yue to make great efforts to govern and finally destroy the state of Wu. He thought that Gou Jian could only share hardships and hardships, not happiness, so he retired, resigned and went into hiding, and took the great beauty Xi Shi to the country of Qi. He is good at management and has assets of tens of millions. After moving to Dingtao, the number Tao Zhu Gong. Some people say that he and Xi Shi drove a boat into the five lakes to live in seclusion.

Lü Buwei, "Historical Records" called him "Yang Zhai Dajia", because of "selling cheap and expensive" and "the family is tired". In the last years of King Qin Zhao, King Zhao took An Guojun as the crown prince, and An Guojun established Mrs. Ai Ji Huayang as his wife. Wang's grandson, Chu, was Qin and lived in Zhao. When Lü Buwei saw Zichu in Handan, he thought that "strange goods are to live in", so he gave him his love concubine, and persuaded Zichu to befriend Mrs. Huayang and strive to become the successor of An Guojun. He funded Zi Chu's daughter, and presented the treasure to Mrs. Huayang. Zichu was finally made his heir. King Zhao died, An Guojun Li, was the king of Xiaowen, died a year later, and his son Chuli was the king of Qin Zhuang Xiang. King Zhuangxiang took Lü Buwei as the prime minister, sealed the letter of the marquis, and ate 100,000 households in Luoyang, Henan. Later Qin Wang Zheng respected him as a prime minister and was known as the middle father.

Zigong, surnamed Duanmu, Mingci, the word Zigong, a patriot in the late Spring and Autumn Period, a famous disciple of Confucius, and one of the "Ten Philosophers of Confucius". Confucius looked down on merchants very much. But before Zigong became a disciple of Confucius, he was in business between Wei and Lu, and he was rich to a thousand gold. "Han Poetry Biography" records: "Zigong, Wei Zhijia people." He was quick to think and had a strong sense of understanding, and he was the most described in the Analects of Confucius and his disciples answering questions. After the death of Confucius, Zigong guarded the tomb of Confucius for six years. Later generations generally believed that the reason why Confucius was famous all over the world was due to the propaganda of Zigong.

Seeing that he used the three sages to cite Shang Jia is not out of the flow, Honggu is not good at scolding Yang Ke anymore, but said lightly: "Having said that, since ancient times, light business has been the mainstream, if the prince really thinks that Shang Jia is not a pariah, we will burn high incense, but we can't be so praised, don't insult the sages." ”

Yang Ke listened, smiled faintly, and stopped making a sound, he felt that along the way, Honggu always seemed to have some small emotions, but where did the emotions come from and why did they arise, he really couldn't guess for a while, and remembered a lyric in later generations "Don't ......guess the girl's thoughts" I couldn't help but raise my eyebrows slightly, and I couldn't help but laugh.