Winter passes quickly, and a month is almost over.

Seeing that there were still a few days to avoid war, Su Yu had to spend civilization points to extend the time.

There is no way, the construction of the city wall has not been completed yet, and it will take more time, Su Yu doesn't want to be disturbed.

What can be solved with money, it can be solved with money.

"A total of 1,500 Civilization Points will be required to extend the two-month period, are you sure about the extension?"

"Yes." Although it was a little painful, Su Yu was still sure.

In the past month, many tribesmen have rushed over one after another. Su Yu took in all the strong and strong, and basically didn't want to come in and fill up the numbers.

Su Yu, who can work and has a skill, was also recruited.

The tribe recruits workers for work, they are lazy to do it, and Su Yu, who wants to cheat and cheat and drink, will drive them away directly, and will not give them a chance.

Su Yu also did this because he wanted to recruit these tribes, but it was impossible to recruit all these people, these were too lazy to do anything, and it was naturally unacceptable to fish in troubled waters.

The tribe grew rapidly, and the people who recruited them lived not in the same place as the tribesmen, they lived outside the city walls. A lot of wooden houses were built outside the city, and they all lived there.

The wooden houses they live in are no different from the wooden houses in the city walls, and every day the tribe will make a big pot of rice, so they now have no worries about food and shelter, and they only need to go out to work every day.

This kind of life makes them a little happy.

……

It hadn't snowed for a month, the snow inside the city was almost invisible, and the snow outside the city was significantly less than it had been a month ago.

Ox carts traveled on hard dirt roads loaded with earthwork and stones needed to build the walls.

There weren't enough rocks near the tribe, which were brought back from the mines on the other side of the greedy wolf camp, and it was inevitable that stones would be dug up while transporting iron ore.

Originally, it still needed to be picked up over there and then transported back, but now it is not needed, just load it and pull it away.

After pulling it back, there will be special people to select it, and after saving the time and manpower for selection, the mining efficiency over there is also a lot faster.

Su Yu also sent people to the coal mine on the other side of Wolf Mountain to start digging coal again.

Now that the labor force of the tribe has increased, many jobs are no longer tight, and the work of building the city wall only needs to let Su Zhuang and a few of them arrange new laborers.

"Patriarch, how do you transport stones and earthwork up this higher place?"

Su Zhuang found Su Yu, who was teaching mathematics to Bai Ling, and asked him about the difficulties he encountered.

"With a pulley!" Su Yu blurted out, and then remembered that Su Zhuang didn't know what this was.

Sure enough, Su Zhuang immediately asked, "Patriarch, what is the pulley group?" ”

"I'll get someone to make this as soon as possible, and you'll know when the time comes." Su Yu replied.

"Okay."

After Su Zhuang left, Su Yu continued to teach mathematics.

Now the tribe recruits more laborers, and it is necessary to pay the laborers, and how much each person is paid, how much it adds up, this needs to be calculated. There is also the arrangement of laborers, the number of people who need to be registered, who are laborers, and who are not, in case there are fraudulent claims, it is not good.

Someone needs to do all these things, but Su Yu can't be left alone, he doesn't have three heads and six arms.

These need to be handed over to the people in the tribe, and Su Yu thought of Bai Ling as soon as he thought of it.

She has a talent for managing this area that has yet to be tapped.

Dealing with these things can just be left to her to do, exercise her, and give her hands. After all, without practice, where can there be experience and improvement.

Sooner or later, Su Yu didn't want to die on the desk as tired as Gao Zu. What's the difference between that and the social animals of 996? If you can touch the fish but not the fish, you are a fool.

"We're talking about functions today, and that's also important......"

Although he is an otaku, Su Yu also graduated from a prestigious university, has a good memory, and still remembers the knowledge of junior high school, but he fished in college and mixed up until he graduated.

After teaching Bai Ling mathematics, Su Yu went to a carpenter to help make a pulley set.

The principle of pulley block, junior high school physics knowledge, Su Yu still knows.

With Su Yu on the side, it didn't take much time for the carpenter to build the wooden pulley set. Su Yu asked him to continue making such a pulley set, and he went to find Su Zhuang himself.

Su Yu took the pulley set to Su Zhuang and showed him how to use the pulley set.

"First build an elevated frame like this, then install the pulley block, and finally the rope, the rope is put on."

After building the elevated frame and installing the pulley block, Su Yu tried to use the pulley to pull up the back basket containing dirt on the ground.

The soil was pulled up very easily, and Su Zhuang also came to try it, and it was really much easier.

As long as the shelves are a little higher, they can be pulled up to a high place without having to move them up with great effort.

"You can also add something so you don't have to pull it by hand." Su Yu suddenly thought of the pulley structure of the ancient city gate, there was a hand-cranked device that could easily pull up the city gate weighing several tons, and there were only one or two people operating it.

Thinking of this, Su Yu immediately ran to find cycads, to fix that thing, you still need to use iron parts, and the pulley block also needs to be replaced with iron, otherwise the wooden one will not be able to hold up.

Su Zhuang quickly learned to assemble this viaduct by himself, and by the evening, there was a pulley block elevated at the construction site of the four city walls.

With this viaduct, it is much easier to raise the city walls and the efficiency is greatly improved.

"Da Zhuang, your pulley set is easy to use, right?" The carpenter who made this pulley set found Su Zhuang.

The carpenter's name is Su Mu, this is the name he changed after he became a carpenter, and other carpenters wanted to take this name, but Su Mu took the lead, his talent is also very good, carpenter talent, this talent Su Yu didn't see it at first, and after Su Mu learned carpentry, this talent came out.

This made Su Yu feel that this panel couldn't trust it too much, everything was variable, and who knew that one day the upper limit of the original three-star talent would also become seven-star.

Although Su Yu hasn't seen it yet, it doesn't mean that there won't be. Talent can hide changes, it's hard to guarantee this, and the attributes can't be said for sure.

"It's easy to use, this soil can be transported very easily. It seems that it can also be used when building a house, but wasn't it difficult to build a second floor to transport wood planks before? With this it is definitely easy. Su Zhuang said with a smile.

"yes, I just thought of it now." Su Mu knew that this pulley set could save effort, but he almost forgot that it could be used to build houses.

The most troublesome thing to build the third floor is to transport the wooden planks, and the inability to transport them is the main reason for the delay in the movement of the third floor. With a pulley block, this problem is solved.

"I'll try it tomorrow."

Su Mu was a little excited, if it weren't for the sun setting now, he would have wanted to try it now.