Although the territory of the Arias family was large, the population was not large before.

Nowadays, there are many people in the green field, but because of the forced weekend, the time that can be served has been reduced by nearly one-third.

Therefore, Miss Rabbit did not have much more people on hand.

Of course, as long as you are willing to spend money, you can still hire workers, but with the popularization of new farming tools and farming methods, the labor cost of green fields is also increasing.

After all, there is much more income from farming now than before, and there are fewer farmers who are willing to sell their labor to their lords.

And the Shuangxiu Sect is also recruiting, and the remuneration is very generous, and it is difficult for Miss Rabbit to compete.

In addition, there is a big reason for the shortage of manpower, which is that the western border is not very peaceful at present, and some large families with strength and financial resources have begun to take precautions, recruit fighters, and train militia.

The Arias family is no exception, Miss Rabbit picks the door and picks the door, the sense of crisis is still quite strong, and she has been paying close attention to military affairs since the success of the dragon slaying, but recruiting and training will also take up a lot of labor.

Seeing a thriving scene outside the Teacup Castle, without the protection of the city walls, the female lord always felt a little uneasy.

Advisor Fausto suggested building a wooden fence around the perimeter first, which was inexpensive and didn't require much manpower, while providing some defense.

In fact, not all towns and castles in the West are made of stone, or only a few can be built of stone, compared to wooden castles and gates.

After all, there are only a few hundred, or even dozens of golden lions, and there are a lot of lords who have a large family of clansmen, and there are a lot of expenses in all aspects.

Without a windfall, they could neither afford the high cost of building a stone castle nor the subsequent maintenance costs.

So don't look at the small area of Teacup Castle, but it is a famous fortified city in the west, which has helped the Arias family resist the attacks of strong enemies several times.

The castle was not strictly built by the Arias family, and most of the construction cost was sponsored by Count Philip, the lord of the Westlands at the time.

On the surface, it is to reward the ancestors of the Arias family for their bravery in battle and excellent performance in the conquest of the Western Frontier, but in fact, it is mainly to monitor and guard against the Yin Manuel family, who have surrendered early.

But in any case, the Arias family did pick up a big bargain.

Miss Rabbit might have accepted Fausto's offer if she didn't have a stone fortress, but now she doesn't like a wooden fence.

As the saying goes, if you don't decide to find Merlin.

The female lord didn't bother with this issue for too long, and directly consulted Li Yu when he came next time.

Li Yu thought for a while and said, "Use a rammed earth wall." ”

"What is a rammed earth wall?" The female lord humbly asked.

"It's just making a wall out of earth."

"How can soil be a wall?" Miss Rabbit shook her head and said, "In this way, if there is a foreign enemy to attack, there is no need to hit the city gate at all, just dig a tunnel and dig into the city. ”

"Rammed earth walls are not that fragile." Li Yu said.

Although this set of city building methods has been in place in the Yin Shang era, it has been used in modern times, such as the tulou along the coast of Fujian and southern Fujian, which are all improved rammed earth plates, with good quality and outstanding defense, and are not under the stone fort.

Later, after entering the age of firearms, it can still play a role, and it will not be eliminated like a stone castle.

As for the problem of waterproofing, the rammed earth wall itself has a certain waterproofness, the density of the soil itself will become very high after being squeezed, and it will become cooked soil after chemical and physical reactions.

Of course, in general, rammed earth walls are still more afraid of water, and there will be some records of rammed earth walls collapsing and collapsing due to heavy rains or flash floods from time to time in history books. The grass seeds mixed in the wall may also germinate after encountering water, damaging the wall, and also need regular maintenance.

】

However, the climate in the west is relatively dry, and the rain is not too much, and the rammed earth wall is quite safe.

But Li Yu could also understand the female lord's worries, so he added, "If you are really worried about the rain, you can also wrap a layer of bricks outside later." ”

There is still debate in the archaeological community about the origin of rammed earth bricks, but the large-scale popularization should have been during the Ming Dynasty, which not only reduced the damage of rain to rammed earth walls, but also made the walls stronger, so as to cope with the threat of artillery and large trebuchets.

There are many brick kilns in Shuangxiujiao, and the skill of burning bricks is getting better and better, so it is not a problem to produce bricks.

The rammed earth wall also needs a lot of manpower, but the advantage is that there is no need to mine stone, and then it takes manpower to transport, so that you can take local materials and start construction immediately, and if you are short of manpower in the early stage, you can base a little lower, and there is a four or five meters is about the same.

After that, it is slowly raised and finally covered with bricks, and the preliminary work and investment will not be wasted at all, and at the same time, it will save more money.

Miss Rabbit was persuaded by Li Yu, although it was a bit embarrassing to use soil to make a city wall, and it was estimated that she would be laughed at by other nobles.

But saving money is one thing, and the most important thing is that Li Yu promised that the city wall would be stronger than the traditional stone wall and difficult to breach.

So the female lord no longer hesitated, and finally adopted the plan recommended by Li Yu.

Later, Li Yu collected some information about rammed earth walls from the Internet, including the proportion of materials, wall structure and ramming methods, and asked Clara to help translate them into the lingua franca of the mainland, and then gave them to the shipwright Fitzwilliam to study.

In fact, if there is a traverser with civil engineering experience to deal with this matter, it will undoubtedly be more efficient, and the final construction quality can be improved by more than one grade.

It's a pity that Li Yu doesn't have the talent for this area yet.

Compared with the progress on the Brattis Continent, the recruitment of reincarnation volunteers is not going smoothly, and it is up to Li Yu to take the risk of being a liar to persuade them one by one, and he has only recruited two servants so far.

One of them is computer science.

The other has been the owner of the food area for so long, and he has always been keen on ghost animals, and he doesn't know how much of his previous expertise is left.

Li Yu also went to buy a few more textbooks for Lu Weijia these days, planning to help him review the knowledge he had learned at the beginning.

But unexpectedly, Lu Weijia took the first step to find and injured Li Yu.

"What, you said you want a camera and a laptop, what are you for?"

"Make a video." Lu Weijia said truthfully.

“…………”

"Station B is gone, you know? Besides, why should I meet your request. Li Yu asked rhetorically.

"Because to help me is to help you." Lu Weijia said confidently.