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Wen Fei was dumbfounded: "It should be square!" He himself was not sure, because at first he only said that the small one was called a fort, two hundred steps, which is converted to about three hundred meters in the current statement.

"That's not big, three hundred square meters, at most it's a small villa!"

Wen Fei sweated profusely, and he didn't think it was right. No matter how small the fortress is, it can't be smaller than the villa, right?

"Just 50 meters, you know I don't know anything about that. When the time comes, it will be bad if you can't answer in front of the boss, so let's help the beauty! ”

The opposite side quickly took a screenshot of a picture, all of which were densely packed with numbers, and Wen Fei was dizzy when he saw it.

"I made a 4,000-square-meter club before, and that's it, let's see for yourself. If you don't have a machine, that's 10 times as long as it is now...... It's a three-kilometer wall, and the man-days needed ......" another form was sent.

Wen Fei was about to cry: "My math teacher died early...... Can you help me see how much cement I need?" "Oh, that's right. I look, the 750 meters of the city wall is 1/4 of my own. That's 159.13 tons. My wall is three meters high, by the way, how high is the wall of your castle and how thick is it?"

"......" Wen Fei still didn't know what to ask, so he had to send an ellipsis in the past.

"Why did your boss invite someone like you over, it's too discerning...... Forget it, it's 2.5 times the height of mine. It's 5 times thicker than mine, no problem, right?"

Wen Fei hurriedly sent a smile.

"That's 795.65 tons!"

Hearing this number, Wen Fei's eyes darkened and he almost fainted. Originally, I thought that I could finish the job by pulling a few truckloads of cement by the way, and helped Uncle Zhang build the fortress at night. Who knew it would cost 800 tons!

According to his small box of goods, the full load is 6 tons, even if it is overloaded, 10 tons. It also costs 80 cars...... If you simply pull 800 tons of salt over and forget it, you can almost wipe out the Western Xia.

One ton is 2,000 catties, and 800 tons is 1.6 million. If it is replaced with salt, it will bankrupt the Western Xia, so that their salt catties will not be sold. It also saves just mules and horses to build a fortress to defend against the plundering of the Tanguts!

"What's wrong?" asked Xiao Yu on the other side.

"I want to buy a piece of tofu!" Wen Fei said, "just hit it headfirst." ”

said that, after going over again, Wen Fei still pulled a cart of cement over and stopped directly in front of Uncle Zhang.

"What is this?" Zhang Shuye asked Wen Fei curiously.

"Cement?" Wen Fei said crisply.

"It doesn't seem to have water?" Uncle Zhang was a little puzzled.

"You add water and try," Wen Fei was very angry, and after a night of fierce ideological struggle, Wen Fei decided to pull the cement.

The name is ominous, and he really wants to pull millions of tons of salt over. That's stupid, I can't stay in the Northern Song Dynasty. But pulling a few truckloads of cement, it's no problem.

Wen Fei instructed Zhang Shuye's subordinates on how to mix cement and how to use it to build things. He is also a mouthful, and has never eaten pork and seen a pig walking. But let him go up and do the work himself, and that won't work.

Uncle Zhang was curious, but he was an elite man in the Northern Song Dynasty, and looking at this posture, he vaguely guessed that it was related to his intention to build a fort. He was a little more attentive to Wen Fei.

Cement doesn't dry out in a while, and even if it's quick-drying, it takes at least two or three hours to see the results. I had a chat with Uncle Zhang, and Uncle Zhang suddenly said: "I heard that the immortal master is under the seat of the true martial ancestor, and we also believe in the ancestor, and now we have built a Taoist temple in the Lanzhou army, dedicated to the true martial ancestor." Speaking of which, the ancestor is the god of the soldiers, and I began to believe in it from my grandfather's generation!"

The belief of Emperor Zhenwu has the saying that it dominates the affairs of soldiers in the world, and it was originally worshiped as the god of war and the god of water. One is that Xuanwu is a water god in the north. Second, because at the beginning of the founding of the Northern Song Dynasty, it was threatened by the foreign Khitan and Liao kingdoms in the north, in order to improve the self-confidence of defending against invasion, it was to beg for the blessing of the northern god Xuanwu.

When Wen Fei heard Daleng, he suddenly remembered. Emperor Zhenwu also had Lei Zhu Deng, Xin, Zhang, Tao, Pang, Liu, and Bi under his subordinates...... Ladies and gentlemen, there seems to be Ge Tianjun among them, and it seems that the title is the Lord of Heaven and the Protector God King. Could it be the blessing of Zhenwu...... The spirits shivered, not daring to think about it anymore.

This kind of fast-drying cement only takes thirty or forty minutes for initial coagulation. The two chatted for a while, and then they saw that the cement was dry.

"How is it possible? It's like a stone?" Gently beating the cement, Uncle Zhang showed a look of surprise and sighed: "Sure enough, it is a wonderful thing of the fairy family, and it actually has such benefits!"

You must know that the construction technology at this time is still very backward, and the construction of the fortress is rammed earth. The so-called rammed earth is made of wet soil layer by layer, and glutinous rice juice is mixed in the rammed earth as a coagulant. Of course, there are even egg whites, and even blood is used as a coagulant.

Don't underestimate the rammed earth walls, which are quite strong, almost all of them stronger than cement. For example, during the Wei, Jin, Southern and Northern Dynasties, the Tongwan City built by the madman Helian Bobo was made of steamed rammed earth, glutinous rice juice, and cow and sheep blood. After thousands of years, it will not be broken!

But this kind of project is too time-consuming. You have to take soil from the ground, and then of course sand can't be used. Then the large pieces of debris in the soil are sifted out, and a layer is smashed with a heavy object such as a large stone. The whole project took a long time to build, and it was far more difficult than Xiao Yu's calculations. Even if it is considered to build a fort of 200 steps, it is recorded that it will take 13,000 people to complete the construction in a few months.

With cement, it is different, it can be completed in just ten days. Of course, it is impossible for Wenfei to transport 800 truckloads of cement.

"Okay, with this thing, Tiandu Fort is just around the corner!" Uncle Zhang was very happy.

Wen Fei poured cold water and said: "Although this thing is nothing with us, it is extremely heavy. I can't bring much at a time, so you need some cement in the key places!"

Uncle Zhang was overjoyed and said, "Even if this is the case, the labor has been greatly reduced!"

The two of them were talking in the Zhang family's camp, and it didn't take long for the people from Iwabe to come over. When he saw Wen Fei, he said, "Wizard, do you still have the knives and guns you told us about last time?"

Before Wen Fei could speak, Uncle Zhang's heart moved, and he asked, "What do you want to do now?"