Chang'an has been the largest city in the world for a long time, and even the largest city in the world. []

From the Western Zhou Dynasty to the current capital of Xu, there have been 21 dynasties in Chang'an City. It has been the capital for more than a thousand years, and this land in Guanzhong is a veritable land of Longxing.

Although Emperor Yang Jian of the Sui Dynasty built a new city in his early years and renamed it Daxing City, in fact, the people of Chang'an are still more accustomed to calling this thousand-year-old capital Chang'an City. The ten thousand years under the city of Chang'an and the two counties of Chang'an together have the meaning of long-term peace and stability.

During the Kaihuang period, the population of Chang'an was as much as one million people, and the population in the city was not less than tens of thousands of foreign merchants, envoys, foreign students, and overseas monks and monks in addition to residents, royal families, dignitaries, soldiers, slaves and miscellaneous servants, Buddhist monks and nuns, and other ethnic groups. At the beginning, there were more than 300 countries and tribes that came to Chang'an and Sui to communicate with them.

There are eight rivers of Wei, Jing, Feng, Shui, Wei, Zhu, Chan and Ba, and the eight rivers surround Chang'an, and the male is the source of the dragon.

Guanshan four stops, one hundred and two Qin passes.

Chang'an, which lives in Guanzhong, is not only a Xiongcheng in one day, but also a strong fortress.

Although the chaos of the two Han Dynasty made Guanzhong more damaged, the Eastern Han Dynasty, Cao Wei, and the Western Jin Dynasty were all Luoyang but not Chang'an. However, the Eastern Han Dynasty practiced the system of three capitals, and Cao Wei practiced the system of five capitals, all of which took Chang'an as the western capital, and Emperor Wu of the Western Jin Dynasty and Jin Dynasty made the system of stone letters, stipulating that non-clans were not allowed to control Guanzhong. During the Northern and Southern Dynasties, the Western Wei Dynasty, the Northern Zhou Dynasty, and the Great Sui Dynasty were all in Chang'an. In addition to the prosperity of Chang'an, it is more due to the danger of Chang'an.

In the last years of the two Jin Dynasty, Liu Yao, the general of the Xiongnu Liu Han, entered the attack, captured the Emperor of the Jin Dynasty, and the Western Jin Dynasty perished. Liu Yao built the former Zhao on behalf of Liu Han, migrated to Guanzhong, and set the capital of Chang'an. The former and later Zhao confronted each other in the north. Later Zhao unified the north. Soon it fell apart. The Di people went west to enter the customs. The former Qin was established and the capital was Chang'an. Former Qin unified the north during the time of Fu Jian. After the Battle of Feishui, the former Qin collapsed. Qiang Yao Chang is slightly settled. After the establishment of Qin, the capital was Chang'an, and the name was changed to Chang'an. After the fall of Later Qin. Guanzhong was again taken by Helian Xia. The Northern Wei Dynasty entered the Central Plains and unified the north. "The change of Heyin?" Later, the Northern Wei Dynasty fell into turmoil, and Gao Huan succeeded Er Zhurong to rise, and wanted to summon the Guanxi Daxing Taihe Bayue to move to Guanzhong. Xue Xiaotong, a subordinate of He Bayue, persuaded Yue not to go to the summons, saying: "The heroes in this pass are all concerned with the public and are willing to follow their intelligence. Gong takes Huashan as the city, the Yellow River as the moat, and can enter Shandong. Withdrawal can be sealed to the valley. I want to be restrained and subject to others! He Bayue followed his plan, and then pacified Guan Long with Yuwentai. Later, Yuwentai welcomed Emperor Xiaowu of the Northern Wei Dynasty into Guanzhong and established the Western Wei Dynasty. The capital is Chang'an. Confrontation with the Eastern Wei Dynasty established by Gao Huan. The Northern Zhou Dynasty and the Western Wei Dynasty were also in Chang'an. The Northern Zhou destroyed the Northern Qi. Unified the North.

The Northern Zhou Dynasty of the Sui Dynasty was still in Chang'an.

Sui annihilated Chen and unified the world. At the end of the Sui Dynasty, Yang Xuangan raised troops and asked Li Mi for advice, Li Mi thought that Emperor Yang of Sui was far away in Liaodong, advocating that the long drive into the thistle, strangle its throat, or take Chang'an directly, he said: "Guanzhong Sisai, the country of abundance." Although there is Wei Wensheng, it is not a concern. A handsome drum to the west, through the city do not attack, directly take Chang'an, collect its heroes, care for its people, according to the danger and defend it. Although the Son of Heaven is still there, he has lost his roots, but Xu Tu is also. ”

Yang Xuan did not obey and was defeated and killed. Later, Li Mi and Zhai Rang raised troops in the Central Plains, but they did not open up the situation for a long time. Chai Xiaohe, a subordinate of Li Mi, suggested: "The mountains and rivers of Qin are solid, and the Qin and Han dynasties rely on them to become kings." Now it is better to make Zhai Situ guard Luokou, Pei Zhuguo to guard Luo, and Ming Gong from Jian Jingjian to attack Chang'an in the west. Both Kejingyi, the industry is strong and strong, and then the east to Pinghe, Luo, spread the world and the world. Fang Jinsui lost his deer, and the heroes competed, if he didn't do it early, there must be those who came first, and there was no regret! ”

Li Mi did not do this because of his concerns.

Later, Li Shimin once suggested Li Yuan: "The heroes of Guanzhong rise together, the unknown is attached, if the public drum goes west, it is caressing, like the ears in the bag." Li Yuan followed his plan and went south to the west to prepare to enter the customs, but was blocked by Yang Jin, Wang Shichong, and Yuwen Chengdu in the east of the river, and finally defeated Longmen and was not allowed to enter Chang'an. …,

At the end of the Sui Dynasty, the heroes competed for hegemony, and Yu Wenhua was originally just a hand, but after getting the competition of the Guanlong nobles, they relied on the natural danger in Guanzhong and sat in Chang'an, but they laughed at the rise of the world. When the beacons in the Central Plains continued, Yu Culture and all sat firmly in Guanzhong.

even sent troops several times, with the ambition of seizing Hedong, swallowing Hanzhong, and Shuzhong.

Although the heroes of Longshang and Longyou coveted Guanzhong more than once and wanted to compete for Chang'an. But with the danger of the four stops in Guanzhong, the only culture of the world and on the contrary, it has repeatedly turned the danger into a disaster, the leader of the righteous army alliance Li Mi, the hero Wang Shixiong, Dou Jiande, Sun Changxun, Liang Shidu and others have been defeated and fell, this theory ability is obviously inferior to their Yu culture and on the contrary, it has the last laugh, becoming one of the eight heroes in the world today.

All of this is naturally due to the danger of Guanzhong.

Guanzhong has a unique geographical situation. The terrain of the world is high in the west and low in the east, and it is divided into three steps from west to east. Guanzhong is located on the second step of the world's topography, backed by the plateau and mountains of the first step, and bordered by the plain area of the third step. Guanzhong has the Qinling Mountains in the south, the Longshan Mountains stretch on the four sides, the Loess Plateau in the north, the Huashan Mountain, the Kunshan Mountain and the southwest mountains of Shanxi Province in the east, and the Yellow River surrounds, which can be described as surrounded by mountains and rivers, and the momentum is reunited. "One hundred and two Qin Pass" is used to describe the dangerous saying in the pass, which means that in the millions of people who tackle the problem, 20,000 people are enough to refuse. With an army of 20,000 to block a million people, the one who is relied on is the danger of its terrain. Guanzhong to the Central Plains, in the terrain is a high-rise situation, there are mountains and rivers on all sides for the danger of obstruction, several important traffic channels, and set up a pass to defend it, so as to form a situation that can advance and retreat, can attack and defend.

One hundred and two Qin Pass, with 20,000 can resist the danger of millions of people, this is the result of Yu Culture and can have today.

It is precisely because of the mountains and rivers and the danger of the one hundred and two Qin Passes that the people of Chang'an City, the center of the Guanzhong, have never really experienced the poison of war in the midst of the war at the end of the Sui Dynasty. The most dangerous one was only when Xue Ju, the overlord of Western Qin, attacked 100,000 miles away from Chang'an, and never entered an inch again.

Many famous cities in the world, such as Jicheng and Yecheng in Hebei, Jinyang in Hedong, Shangdang, Luoyang in the Central Plains, Daliang, Pengcheng in Huaisi, Xuzhou, Jiangdu, Shouchun, Jiankang in Jiangdong, Jiujiang, Jianghan Jiangling, Jiangxia, Xiangyang, and even Hanzhong Many large cities and towns are in the midst of war, and when they have fallen and changed hands several times, Chang'an is still prosperous.

Even in the midst of the war, even the Silk Road from Chang'an in the east has never been interrupted, and countless caravans on the Silk Road still keep coming to Chang'an, bringing endless prosperity to Chang'an.

Living in Chang'an City, it seems that he can't feel the chaos of the world at this time, and it seems that the world is still in the early years of the Great Sui Emperor's opening and great cause.

When the envoys of the six countries came to Chang'an to meet the alliance, countless caravans poured into Chang'an, adding countless excitement to Chang'an. Those Chang'an people are more and more happy, in their opinion, Chang'an has deviated from the position of the center of the world due to the war over the years, and it is finally back at this moment.

The residents of the center of the world finally felt the superiority of others.

In the city of Chang'an, even the curfew was canceled for the Six Nations Alliance, and Chang'an at night once again became a city that never sleeps with brilliant lights.

In the final analysis, there is a kind of nobility in the bones of Chang'an people, which is a kind of heritage brought by the thousand-year-old capital of the 21st Dynasty.

With the arrival of the Six Nations Missions, Chang'an finally became the center of the world again. Everyone was talking excitedly, and the excitement of Chang'an people finally turned into a carnival.

I don't know when and who started it, but the night market, which would have closed at midnight even if the curfew was lifted, became an all-night market. All kinds of wine shops and restaurants have tall lanterns, banners are waving, and the sound of talk and cheers overflows the market. …,

Juggling, which was originally held only for a grand festival, also poured into the long street. Stepping on high warps, breathing fireballs, swallowing long swords, and even selling strong pills, all kinds of artists seem to have poured into Chang'an all at once.

Out-of-town businessmen stood under the eaves of the street and excitedly pointed out and discussed, or listened to the old people around them with a smile and commented with emotion on the big drama that they had not seen for many years. Under this excitement of carnival, even the shops in the three major markets in Chang'an City also began to reduce prices. A large red cloth is hung high in front of each shop, and the word "Huan" is written in a big book, and below it is "down eight" or "down five" and "down six".

In the carnival of Chang'an, there is one place that is very deserted, and there is even a kind of suppressed anxiety and anger.

This place is a large green building in the middle of Chang'an City, and on the surface, this green building also played a pretext of celebrating the carnival in this carnival, which attracted the business of the green building to be more popular. But in a well-guarded underground hall in the backyard of the Qinglou, this is the base of the Guanzhong branch of the Chen Dynasty's secret service.

The arrival of the missions of the six countries, the alliance between the seven countries and the Turks, all of this made the agents and officers of the Guanzhong Special Service Division very worried. The matter of the Seven Nations Alliance was immediately investigated and learned by them, and all the news found was also transmitted to Chang'an and sent to the Luoyang headquarters as soon as possible.

The alliance of the Seven Kingdoms is a very big thing, and the alliance between the Seven Kingdoms and the Turks is a big thing.

Once this alliance is formed, it means that all the forces in the whole world outside of Dachen not only stand on the opposite side of Dachen, but have already united, even uniting the Turks. This is a powerful alliance, the alliance is one, Da Chen will be adversarial on all sides, there is no alliance, not even a neutral party.

For a time, the entire Guanzhong Special Service Division entered a state of emergency. As soon as possible, the Guanzhong branch activated all the hidden piles and inner lines that had been ambushed in Guanzhong, and even some of the top internal responses were all activated.