A heavy rain just now made the already bumpy road in Ziwu Valley even more slippery. Although the framework for the first half has been built, due to the current situation, Liu Yi only came to construction in the first half. As for the second half, he could only wait until the war is over before talking about it. The civilians were put back half of the road. This construction of roads is not a free road construction, and the price of 100 yuan a day is not low, so there is no need to worry that people will not be gathered at that time.

Seeing that the mountain road was difficult to move, in order to avoid unnecessary casualties, after the heavy rain, Liu Yi asked the craftsmen to take two days off, but there was no money, but a meal was still provided every day.

In Liu Yi's temporary camp, a huge sand table occupied at least half of the space of the camp. The mountains, rivers and rivers from Yangping Pass to Ziwu Valley were all presented on this sand table. Liu Yi carefully compared the map. During this period, except for supervising the worker, the most he did was to explore the terrain under the guidance of the guide. After a few months, from Yangping Pass to Ziwu Valley, the mountains and rivers were like patterns in Liu Yi's palm, and then he made this sand table.

Not to mention that it is exactly the same, but the approximate proportion and terrain are not wrong. For Liu Yi, the biggest function of this thing is to improve his own design. Of course, it is also applicable in military terms. With this sand table, as long as the information sent by the scouts and horses is timely, the enemy's movements will be completely secret for Liu Yi.

"A arch bridge is built here, and the brackets must be made first. The length is three feet, five feet, six inches long, one three feet high, and one two feet wide." Liu Yi pointed to the location of a mountain stream and said to the craftsmen beside him that although the civilians stopped working, Liu Yi carefully modified the road design every day.

"Sir, we have also visited this place before. It is difficult to transport a three-foot-five-six-inch bracket. This is too heavy. The roads in this area have not been repaired yet. It is not easy to transport it up, and the crane cannot be up." A craftsman frowned.

The brackets are made of iron. In this year, there was no welding technology. These brackets must be cast in the workshop and then sent up. Liu Yi developed cement, but it was just cement, not concrete. It is impossible to build it by relying solely on cement. After the brackets are placed, a layer of wooden boards must be laid, and then built with cement and bricks. These problems are everywhere in the Wu Valley.

"I have thought about this too!" Liu Yi nodded and looked at a group of craftsmen and said, "Can you try to make these brackets into mortise and tenon structures when casting them. In this way, the brackets can be disassembled into one by one, transported to the place and then assembled?"

His casting skills are already level 6. This kind of difficult thing was difficult to cast in the past, but now with the problem of furnace temperature, some simple smelting operations can be carried out. Although the brackets made in this way are not directly solid, most of the properties that appear in buildings such as bridges will have properties such as solid and stable, which should make up for the shortcomings in this area.

"May give it a try!" Several blacksmiths' eyes lit up when they heard this. They followed Liu Yi when they were Mocheng, and they had a certain foundation in blacksmiths. Over the years, they followed Liu Yi to travel around the world, but not just a simple blacksmith, but often, some difficulties also need to be overcome.

"Try to make a pair of them while you are resting now. If it works, use this for the bridge construction in the future, but the brackets under the bridge cannot do this." Liu Yi nodded and smiled.

"Don't worry, sir, I know what to do." Several blacksmiths agreed.

With this idea, many questions can be done in this way. Some people even suggest that you try to make a large bracket that is thirty feet long. In this way, just this large bracket will allow the new army to avoid mountain roads of at least thirty miles in the future.

Liu Yi did not agree directly, but he could give it a try. If it is really successful, the Ziwu Valley Road can save half of the distance alone.

From Hanzhong to Ziwu Valley to leaving Qinling Mountains, the distance is actually only more than 300 miles, but in fact, the actual distance to go up and down the mountain is twice or even three times the distance of the map. If a bridge as long as 30 meters can be built and it can be stable, there will be too many roads that can be saved.

But the design of a bridge is not just a matter of building a bridge. There are many things to consider, especially the 30-meter-long bridge, which is suspended. How to solve the problem of load bearing, how to fix it, etc. With the current technical level, to solve these problems, I am afraid that a lot of things will have to be done under the bridge to stabilize the bridge body.

"Sir!" Huang Zhong walked in quickly and politely said to Liu Yi.

"Elder General, what's the matter?" Liu Yi saw Huang Zhong's serious expression and knew it was related to military affairs. He waved his hand and the craftsmen in the tent retreated tactfully.

"The traces of Cao's army were discovered." Huang Zhong said in a deep voice.

"Oh? How many people are there?" Liu Yi asked quickly, "Who leads the troops?"

"It was not a large group of people, but I just discovered the scouts of Cao's army. The provocateurs were afraid of leaking their whereabouts, so they did not dare to get too close." Huang Zhong shook his head. The Shu army was good at mountain warfare, and most of the scouts sent were elite, so they relied on their strong adaptability to the terrain and could hide their tracks and not be discovered by enemy scouts. If this was in a plain, it would not be so easy.

"Can you know the approximate range?" Liu Yi pointed to the sand table and signaled Huang Zhong to mark the other party's position.

Generally, scouts have a rough range to detect information. Once they know the location of the scout, they can infer the approximate area where the opponent's main force is.

"This area!" Huang Zhong looked on the sand table for a while and pointed to the general position: "Depending on the situation, it's true that he is walking on Ziwu Road!"

"I have entered the Qinling Mountains for a hundred miles?" Liu Yi looked at the location and said in surprise: "Send a few elite scouts to explore along this area and try not to be discovered. If three people are really discovered, do it cleaner. The road is dangerous. It is common for the scouts to be unfamiliar with the road, get lost or fall off the cliff. But remember to be careful. If you are uncertain, try to avoid the other scouts as much as possible. Be sure to find out the specific location and how many soldiers there are."

Liu Yi did not ask many scouts to send, and it was easy to be exposed. Before, he was not sure whether Cao's army would take a sneak attack, and he didn't know whether the other party would leave Ziwu Valley, so he used the method of casting a wide net. Now that he already knew that the other party was walking Ziwu Valley, he naturally could not send so many people to increase the risk of exposure. However, the person who investigated this time must be the elite among the elites.

Huang Zhong nodded, and that's what he meant.

"What's the war in Yangping Pass?" Liu Yi frowned and asked. Since Cao's army appeared in Ziwu Valley, although he had not yet taken over the enemy, it was almost time for the Yangping Pass to fight. Liu Yi has been busy building roads for these days, but he doesn't know much about the information on Yangping Pass.

"Ma Chao has led his army to Yangping Pass the day before yesterday, and the two sides have already fought." Huang Zhong is responsible for these matters. News about Yangping Pass has been reported yesterday.

"Ma Chao~" Liu Yi smacked his lips. The plot is different from history, or it is completely messed up. I just don't know if there is still a chance to surrender Ma Chao.

Although his character is not very good, if Ma Chao can be recruited, the role of Ma Chao in sending troops to Xiliang and Guanzhong in the future cannot be ignored. General Shenweitian has a very high influence among the Qiang people. With Ma Chao here, as long as he is ready to send troops, the Qiang people in Xiliang can at least fight for it and can directly gain the advantage.

"Send someone to notify Wen Zhang and find an opportunity to severely damage the Xiliang Army first!" Liu Yi smiled at the location of Yangping Pass. He left a lot of backup in Yangping Pass. Although he wanted to recruit horses and surpass him, if Ma Chao was too strong, with Ma Chao's temperament, it is easy to have problems. So no matter whether he could surrender Ma Chao, he had to weaken the strength of Ma Chao's subordinates first. When he had the opportunity to surrender, Ma Chao would not be able to make up many waves after entering Hanzhong. It would be best to send him to Shuzhong to help Liu Bei. Liu Yi had no intention of dealing with these bad things.

"Here!" Huang Zhong nodded and agreed. Although he didn't know why Liu Yi had such an idea, since Liu Yi said that, there were naturally Liu Yi's considerations, and more importantly, Ma Chao was the enemy, so Huang Zhong naturally did not need to consider so much for the enemy.

...

Ziwu Valley, on the other side.

Seeing that the two Cao soldiers fell off the cliff due to carelessness, the soldiers around them were too late to pull them, Deputy General Cao Rong came to Xiahou Yuan and said, "General, it's raining just now. The road is difficult to walk, and now it's even slippery. It's better to take a day off before leaving!"

Xiahou Yuan rubbed the mud under his feet, shook his head and said, "We don't have much military ration. If we repair it at this moment, it may be difficult to get out of the Ziwu Valley and let the soldiers accelerate their march."

"Swish~"

As soon as his feet slipped, Xiahou Yuan fell down. Fortunately, Cao Rong quickly saw his eyes and hands, so he grabbed Xiahou Yuan.

"Be careful, General!" Cao Rong pulled Xiahou Dun up, and said a little scared.

Xiahou Yuan nodded silently, looked at the abyss with lingering fear, and quickly turned his head, not daring to look again. He followed the soldiers and walked forward step by step carefully, and walked forward more than an hour before he walked past the mountain road of more than a hundred feet.

"Let the soldiers wipe out the mud on the soles of their feet before leaving!" Xiahou Yuan stopped, sat on the bluestone beside the road, took off his shoes and removed the mud on the soles of their shoes before putting them on, looking at the mountain road ahead, and instructed Cao Rong.

"Here!" Cao Rong nodded and asked the soldiers to clean up the soles of their shoes first. Xiahou Yuan took out the map to see. They had only entered the Ziwu Valley for only a hundred miles. If they went further, they had to walk at least two hundred miles. They could only walk more than ten miles a day. This speed was just now, so how could they have time to stop and rest?
Chapter completed!