Since the uprising of deceiving Yizhou and seizing Zhuozhou, the Wansheng army led by Zhou Nan has gradually developed from the initial 4,000 cavalry and more than 10,000 infantry troops to more than 10,000 cavalry troops later, and the infantry troops are basically stationed in various states and counties.

  Later, the Black Iron Army led by Yelu Yu Liyan and Xiao Laoliu rushed to Yanjing from Danzhou, pacified Yanjing with the Wansheng Army of Southern Zhou, defeated the Xi Rebellion, and the elite cavalry of the Wansheng Army always fluctuated up and down with more than 10,000 people.

  Most of the men and horses of the Black Iron Army are stationed in Juyong Pass and other passes, and the elite cavalry remaining in Yanjing City is only four or five thousand people.

  It can't be said that the Wansheng Army stationed in various places now can't do it, all the Wansheng Army soldiers are selected by Zhou Nan, Gao Yuan, and Yang Keshi alone, one person, those soldiers who really can't do it have long been eliminated, and all the Wansheng Army who can stay are stronger than those soldiers in the Great Song Dynasty, I don't know how many times stronger. It's just that Zhou Nan didn't want to keep the standing and elite Wansheng army too many, and the total number was controlled within 20,000 people, and they were all cavalry, and if something happened, they could arrive at any time. If the 20,000 standing elites were not enough, Zhou Nan gave an order, and 20,000 cavalry troops could be immediately drawn from the Wansheng army stationed in various places.

  In addition to the Wansheng Army, there is also the Black Iron Army of the princess of Shu. Most of the Black Iron Army is a cavalry army, and the five thousand elite cavalry troops left in Yanjing City are not much, which is quite in line with Zhou Nan's thoughts. And because of the princess of Shu, in addition to obeying Xiao Laoliu's orders, she was even more respectful and obedient to Zhou Nan.

  After the prefects and county commanders of these prefectures and counties accepted the task of Zhou Nan's recruitment and transfer of people, Zhou Nan urged Tao Gu, Shi Yue, and Wang Shunzhou to select soldiers, and asked Gao Yuan, Yang Keshi, Wang Sanmad and others to make up for the elite lost during this period of war from the soldiers stationed in various places, and on the other hand, they began to discuss with Gao Yuan, Yang Keshi, Shi Yue and others how to build Xinguan City.

  Gao Yuan and Yang Keshi both agreed to start from the ancient Great Wall on Jiaoshan in the north and go all the way to the sea, and the new Guancheng is on the inner side of the middle section of this wall, and the only entrance and exit gate on the wall is the east gate of Guancheng.

  Xinguancheng is a camp and school ground for soldiers to stay and practice, and it is also a place for the main general to deal with military affairs. Therefore, there should be a government office, barracks, bell and drum towers, school grounds, arsenals, grain depots, etc. In addition, outside the east gate of the gate, that is, outside the gate of the wall, a semicircular urn city was specially built to strengthen the defense at the gate.

  And in the middle of the wall of more than two miles on the left and right, a tower was built to guard the enemy, and there were soldiers on duty day and night on the top, and the bottom could also be used as a temporary accommodation and eating place for the patrol soldiers.

  On the wall, every fifty steps, a section of the horse-faced wall was built to facilitate the formation of a left-right flanking posture against the enemy troops besieging the city. These are the standard configurations of the Great Song Dynasty to build the city wall, and it is enough to have Yang Keshi alone. Zhou Nan emphasized that a deep ditch should be dug outside the Guancheng, first, to use soil when building the Guancheng, and secondly, to make the Guancheng wall higher, and the difficulty of the enemy's attack on the Guancheng will increase.

  As for the height of the wall, Yang Keshi felt that the height of four zhang was enough, and if it was higher, he was afraid that the difficulty would increase when it was built, and the construction time would be longer.

  Zhou Nan shook his head, although Sizhang was already very tall, but under the attack of the sea of people, it was inevitable that something would go wrong. Zhou Nan found a random stone on the ground, drew a wall on the ground using the method of three-dimensional geometry, and then drew another wall on this wall, but the foundation of the upper wall shrank a little back from the wall below, like steps. In this way, it can be built all the way up without a single wall, which reduces the difficulty of craftsmen to build, and can also increase the height of the closed wall.

  "It's easy." Yang Keshi glanced at it and said, "If you build according to this shape, you can build two feet higher." In this way, there is a moat on the outside, and the wall on the inside is high, even if the ladder wants to be built, it is not so long. ”

  Shi Yue also said gratefully: "Thanks to the big village master here, otherwise the small ones would not have thought of such a method, at most, like General Yang, they only know how to build a wall three or four zhang high." ”

  "In order to repair Xinguan City as soon as possible, this is already the simplest plan." Zhou Nan said, "When Xinguan City is repaired, the army can evacuate here." Otherwise, a few more winged cities must be built at the walls on both sides, right? ”

  Shi Yue frowned and thought for a while, and said, "After the Xinguan City is repaired, it will take about a year to repair. ”

  Zhou Nan immediately said: "It's too long." It will take up to half a year to complete. If you don't have enough people, you can ask them to recruit more people. It just had to be completed by July. ”

  Yang Keshi also helped Shi Yue and said: "One year is already more than a craftsman. Half a year is too short. ”

  Zhou Nan still insisted: "You can't tie the army here and not move." Even if it takes half a year to build the wall. You can build the castle in full again. ”

  Shi Yue's face softened slightly, and said, "The little one will lead his men and men to build the wall within half a year." ”

  Zhou Nan said with a smile: "Don't worry, since I ask for this, I have to think of some ways for you, and I can't make you think that I am making things difficult for you." It just so happens that craftsmen from all walks of life in Yanjing City gather these days, and tomorrow I will send people to Yanjing to recruit more stonemasons and bricklayers. ”

  "Please also ask the lord of Dazhai to give the name of Xinguan City!" Shi Yue hurriedly said loudly, he had become the city lord of Xinguan City, so he naturally had to ask for a Guan name first.

  "Let's call it Shanhaiguan!"

  "Good name! It's much more magnificent. Gao Yuan hurriedly said: "Brother Shi only needs to supervise the work, and the more solid the cultivation, the better." ”

  "Are you in a hurry to get out of here earlier, so that you can follow Da Lang to Yanmen Pass?" Yang Keshi said with a smile.

  Gao Yuan was said by Yang Keshi, and also said with a smile: "Don't you Yang Datou want to go more?" Yesterday you told me that you were going to take me to your house to play. ”

  Yang Keshi listened to Gao Yuan learn his words in front of Zhou Nan, and couldn't help but glance at Zhou Nan and smiled awkwardly. He vowed to follow Zhou Nan and never return to the Southern Dynasty. Gao Yuan's big grin is nothing, if Zhou Nan knows that he still can't forget the home of the Southern Dynasty, he is afraid that Zhou Nan will misunderstand himself.