After a long discussion, the two wolves finally decided on a strategy against the enemy, given the enemy's extremely strong combat ability, the field battle is too unfavorable for the emirate, so the emirate's army should try to avoid encountering the enemy in the field.

This does not mean that they have given up the opportunity to take the initiative and will only fight the same defensive war on the territory of the Emirate as last time, the idea of the White Wolf is to rely on the terrain of the underworld to turn the field into a controlled area for our forces.

In the White Wolf's understanding, the topography of the underworld is an irregular cobweb, with key meeting points between each passage, often an open or narrow area where entrances to other passages can be found leading to the next one.

A junction connected by a passage is called a geographically adjacent junction, and as long as the two adjacent junctions are contained, it is absolutely impossible to enter the passage unless the enemy excavates another passage by digging through the earth.

The answer is to build concrete fortifications, and once a fortress is erected at the junction that is difficult for the enemy to attack from the outside, the security of the surrounding passages can be guaranteed.

Concrete is an artificial stone made of cement as the main raw material, water, sand, stone, and then mixed with some chemical materials and other minerals, matched in appropriate proportions, and evenly stirred and hardened.

The main raw material of concrete, cement, is made of limestone, clay, and iron ore powder in proportion to grind and mix to obtain a mixture called raw meal. The temperature is then raised to about 1450 degrees Celsius, and the raw meal is calcined, and a mixture called clinker is obtained after calcination. Then the clinker and gypsum are ground together and mixed in proportion to obtain cement.

At this time, the cement is called ordinary Portland cement, also called ordinary cement. Cement is generally divided into ordinary Portland cement, Portland cement mixed with mixed materials and special cement. Portland cement mixed with mixed materials is to add other substances to ordinary Portland cement in proportion and certain processing procedures to achieve special purposes, such as slag cement, porosyl Portland cement, fly ash Portland cement, composite Portland cement and so on. The raw materials of these cements are more active mixed materials or non-reactive mixed materials than the original ordinary Portland cement.

However, the white wolf is not going to be so complicated here, ordinary Portland cement is enough for him to use. The hardened concrete is strong enough to build fortifications.

In addition to the main raw material cement, concrete also needs aggregate, in concrete, sand and stone play the role of skeleton, called aggregate, cement and water form cement slurry, cement slurry wraps on the surface of the aggregate and fills its voids. Before hardening, the cement slurry plays a lubricating role, giving the mixture a certain lubricity and making it easy to apply. After the cement slurry hardens, the aggregate is cemented into a solid whole

Aggregate is divided into two types: fine aggregate and coarse aggregate, of which fine aggregate is aggregate with a diameter between 0.16~5mm and fine sand. Natural sand is generally used, which is a mixture of different mineral particles formed by rock weathering, such as river sand, sea sand and mountain sand. This sand can be found everywhere in the territory of the white wolf.

The coarse aggregates commonly used in ordinary concrete are crushed stone and pebbles. It is obtained by crushing and sieving natural rocks or pebbles, and the rock particles with a particle size greater than 5mm are called crushed stone or crushed pebbles. Particles with a particle size greater than 5mm formed by the action of natural conditions are called pebbles.

These things are mixed together according to a certain proportion, and after uniform mixing, concrete can be obtained, and two earthen walls are erected between the fortifications to be built, and then the concrete is filled in the center of the earthen wall, and the concrete is hardened, and a hard wall is made.

The construction of a fortification at the entrance to the passage with such concrete would have been a good defense against enemy attacks, and according to the judgment of the White Wolf, although the enemy had brute force due to the effect of the gray fog, their strength was not enough to break through the line of heavy shield spearmen, and the concrete wall was much stronger than the line of long soldiers. For the enemy, this is an impenetrable barrier.

With the two adjacent junctions under control, it only takes a thorough clearing of the passage connecting them to ensure the absolute safety of the area, and once it is confirmed, the concrete fortifications on both sides of the passage can be removed to facilitate the passage of the emirate's soldiers.

In this way, every time you control a junction, you can move towards a certain passage, enter the next junction, wait until the engineering team has built fortifications at the next junction, carefully clean the passage, and then dismantle the concrete fortifications on both sides of the safe passageway, so that the white wolf can expand his territory in a very low-risk way, at the cost of consuming some sand, stone and water.

The gray fog will affect people's consciousness, and the white wolf does not dare to send troops into the gray fog to explore or conquer, perhaps the best outcome in the future is to use concrete to seal all the passages that can lead to the gray fog.

The White Wolf gave the task of casting the fortifications to the industrial department, and the military department was responsible for defending while the casting was made, and the two departments were to cooperate with each other to complete this task.

While the white wolf is preparing to solve the threat step by step and gradually advance, on the other side of the underground world, humans are also using their methods to investigate the movements of the underground world.

Ruth found that the deeper he went, the thicker the gray fog became, and he vaguely noticed that the gray fog seemed to have a certain effect on his spirit, and his mood became a little irritable, unable to calm down, and there were some dark thoughts that kept lingering in his heart.

"Hmm... Is it a mist that affects people's spirits, this is very similar to the nature of the legendary gray nightmare, but why does the gray nightmare appear in the underground world? Could it be that the dark creatures have returned?" Ruth felt that the gray fog in front of him was thicker, and he was afraid that it would be dangerous to go deeper like this, so he stopped, and put his backpack and oil lamp on the ground at the same time in a vigilant manner.

Ruth opened his backpack and pulled out a transparent bead with some simple and sacred patterns carved on the surface.

"If it's really a Grey Nightmare... Something from the Church of the Light should be useful. Ruth took the beads in his hand and stroked the pattern with his thumb in a certain order.

As Ruth touched it, the inside of the bead gradually emitted a golden light, which was the holy light revered by the Holy Light Church, and where the Holy Light shone, the gray mist retreated.

"Looks like this thing is a gray nightmare... Things are in trouble. With the orb of light in his hand, Ruth picked up his backpack, picked up the oil lamp, and continued to walk forward.

The light from the beads would dim every once in a while, and every then the Grey Nightmare would surround Ruth again, and he could only touch the beads again to make the light from it become stronger again.

This bead is also considered an heirloom of Ruth, as long as you touch it often, the holy light can be continuously emitted from it, but the holy light contained in it is not endless, it lasts for about a day, the holy light inside will be exhausted, and it will take three days of sun exposure to recharge it again.

Ruth didn't know if the other adventurers had other means to avoid the Gray Nightmare's attack, but the fate of others was not something he should think about, and he just had to concentrate on the task at hand.

In fact, he was already a little glad that he was separated from the rest of the team, if his treasure was taken out in front of others, it would definitely be coveted, and the thing that would emit holy light was definitely a rare thing, and it contained great value, which was enough to ignite the fire of greed in the hearts of other adventurers and mercenaries.

Aside from the despicable nature of many mercenaries born for money, most of the adventurers are not saints, many of them are forced to join the adventurer's association because they can't live a stable life, looting ancient tombs, stealing finances, and even blackmailing people for help, these things are simply commonplace for some adventurers with low morals, in fact, even ordinary people have such a greedy problem, if they have money, they must not be exposed, it is precisely because Ruth will not trust other people, he can live in a cruel society until now。

The value of the bead that can emit holy light in the human world is very high, on the one hand, it is its use value, the holy light can be used to dispel a lot of evil things, for adventurers, the holy light is an excellent aid for their adventures, just like what Ruth is doing now, it can also be used as a town house, with such a thing, you don't have to worry about being invaded by some evil demons in your sleep, suffering evil curses, so generally speaking, such as kings, nobles, or rich businessmen, this is a very good treasure of the town house, which should be placed on the bedside of the bedroomIt can effectively prevent the despicable and insidious calculations of various cults or gangsters.

For those who are strapped for money, there is another way to deal with the Holy Light Orb like this, and that is to hand it over to the Holy Light Church, for the church, things like this that can emit holy light will generally be treated as holy relics by them, and they will give the person who handed in the holy relics a lot of money, and they will also grant this person the honorary title of a salute, and the person who obtains this honorary title, if something happens, can come to the Holy Light Church, if it is not a bad person who has done a lot of evil, the Holy Light Church will continue to support them for a lifetime, until these people die of old age, although this kind of protection also requires the sheltered person to pay a certain price, such as the right to travel freely, but also a good option for those who are desperate.

The Holy Light Church is a very reputable organization in the human world, and they will never embezzle holy relics without giving money, the reason why they do this is because they do have money, and secondly, because if they really do something to embezzle treasures, they will lose their credibility, and no one will submit holy relics to the Holy Light Church again. The Holy Relic is an extremely important and precious thing for the Holy Light Church. Read the latest chapter of "White Wolf Paw Book House in Another World" for free for the first time.