In the north, the wall known as the lifeline stands like a magnificent Great Wall. Its huge body of fifteen meters high and six meters wide makes it an unbreakable line of defense. It starts from the Shiziling Mountains in the south and reaches Minghe River in the north.

The water area, with a total length of 78 kilometers, took several years and a huge amount of manpower was used to fight and complete the construction.

The existence of the lifeline also proves its value and is worthy of the cost of its construction.

Before there was no lifeline, zombies were almost constantly pouring from the coast to the northern interior. The huge population along the coast led to a steady stream of zombies. They seemed endless, attacking and gathering inland every day and every minute.

People living in the north live an extremely difficult life. As soon as the warning comes every day, everyone will be moved immediately. People living here have two to three settlements, almost playing hide and seek with zombies.

Pass through.

With the strong rise of the general, scattered settlements were merged into one, creating the largest settlement in the north.

If we say the only bad thing is that the forces belonging to the general are too close to the coast, the entire huge settlement needs to face huge groups of zombies every day, and it takes a huge amount of manpower to stop them, which also restricts the general.

The development left him trapped in one area. He had no problem protecting himself, but he was unable to develop and annex other settlements.

With fierce battles taking place every day, the lifeline plan was put forward and huge manpower began to be used to build it.

In the words of many people, this was a period of hard work. Hundreds of thousands of people rushed on it and used ants to build a city, bit by bit, to build this huge wall of 15 meters high and 6 meters wide.

It was built. In front of the construction, hundreds of thousands of soldiers were fighting zombies to prevent the zombies from hindering the construction of the wall.

Under these conditions, the entire construction was completed intermittently after three years of fighting and construction.

Thanks to the existence of the lifeline, the entire settlement is no longer troubled by zombies from the coast. People living here live and work in peace and contentment. Various workshops and factories have sprung up one after another, and a lot of farming has been done so that everyone can eat well.

Besides, there will be some leftover food, so we don’t have to worry about struggling with hunger all day long like we did in the past three or four years.

However, the zombie offensive is still very fierce. Every day, waves of zombies attack the wall. Fighting continues every day, and violent gunshots appear on the lifeline day and night. Occasionally, there are pauses to clean up the deposits below.

When the zombies are dead, collect the crystals one by one.

At the same time, the daily consumption of ammunition also seriously restricts the development of the settlement. It is precisely because of this that the general, as the ruler of the entire settlement, is always looking for another solution. The use of crystallized energy

, came into his eyes, and the research in the past three years finally broke through many difficulties.

In fact, "general" is just an honorific title for the previous position and respect. Over time, everyone has become accustomed to calling him "general" and just let it go. After all, he also likes the honorific title "general" very much.

At this time, the general was leading senior generals from large and small settlements to appear on the top of the wall. Below was a surging group of zombies, stretching as far as the eye could see. The seventy-eight kilometers that were intercepted were all covered with zombies, numbering in the tens of thousands.

There are millions of them, they are constantly hitting the wall, and from time to time there will be piles of layers on top of each other.

"General, there is news from the Ministry of Commerce and Trade that there have been changes in the Tianzhou Plain. It has been annexed by a force called the Yuanqiang Chamber of Commerce. The other party has a large number of fighter planes and is very powerful." As the general's secretary, most of the news,

Everything needs to go through his hands, which can be said to be a very powerful position.

The general frowned and glanced to the west unconsciously.

Since the secret of the crystallization was solved bit by bit, huge human resources have been invested. Sometimes, in order to obtain the necessary equipment and components, the generals would even send heavy troops to attack the city and take back the needed things from inside.

You must know that the impact is on the city, and the number of people who can come back at any time is definitely not more than one-third. Paying such a heavy price is to be able to use the crystal in advance.

Regarding crystallization, the general understands that this will be a brand-new energy method. As long as its secret is known to the world, everyone will go crazy for the crystallization. It is the advanced foresight that allows the general to succeed no matter how difficult it is.

Chu Ya took out a large amount of weapons and ammunition, sent out a large number of caravans, and attacked everywhere, exchanging weapons and ammunition for crystals.

This strategy was very successful. A large amount of crystals were collected, plus what was obtained from killing zombies. Dozens of mountain warehouses were piled up like mountains.

Tianzhou Plain is a bit far from the north, but it does not hinder the arrival of merchants. With small passenger planes, merchants can be transported to various places. The requirements for landing are also very low, as long as there is an open secondary road.

Landing. It is this low requirement that allows the caravan to reach each surviving human activity area and carry out trade operations.

Now that he hears that an important crystal acquisition point has been annexed by an unknown force, just thinking about the hundreds of thousands of people on the Tianzhou Plain, the general feels a pang of pain in his heart. If there are no accidents, his plan is to successfully use the crystal

At that time, he incorporated Tianzhou Plain into his colony. He didn't expect that someone would be one step ahead of him.

This news seems to have some impact on the general's mood, but not much... For him, the important thing is that today's crystallization will be used in actual combat, and it will also usher in a new era for crystallization. In this case

Under the circumstances, the fall of Tianzhou Plain would naturally have little impact on him.

To put it another way, the Tianzhou Plain is currently beyond reach. Just in the north, there are several large settlements. If you haven’t taken it into consideration at the moment, how can you have the energy to make distant ideas? For the general, the crystallized

By using it, you can increase your strength dozens of times, and you can sweep away the entire north... If you want to capture the huge population of Tianzhou Plain, just go and get it.

Thinking of this, the general became indifferent to this information. He turned to look at Dr. Bai next to him and said, "Dr. Bai, the next step will depend on your research results."

Dr. Bai nodded excitedly and said: "General, after nearly four years of research, isn't it just for this moment? From knowing the use of crystals on the human body to now, we have studied hard for seven months before finally finally

Able to popularize and stably use the energy of crystallization. Yes, no one would have thought that the real use of crystallization would be like this... As for us, we can be sure that from the information we have harvested, we are ahead of everyone."

Yes, Dr. Bai has reasons to be proud, because his research results will definitely change the situation of humans facing zombies.

Humans are too fragile in front of zombies. Even a slight scratch on the skin is fatal. It is better in open areas, but in narrow places such as city alleys, humans are no match for zombies.

There may be deadly zombies hiding in the corners that you don't pay attention to. Their lurking abilities can keep you unaware.

Some people have proposed before that the soldiers should be dressed in armor like ancient soldiers to protect their whole bodies from zombie attacks.

However, the armor used by ancient soldiers cannot be called armor, but is made of some leather, which has limited protection. The armor used by officers is called armor, but it is very heavy.

Moreover, it only protects important parts of the human body, such as arms, neck, head, legs, and armor cannot protect them.

Maybe in ancient wars, your hands and feet were injured by weapons, and you might be able to go out and kill the enemy after recuperating. But in the end of the world, as long as you are injured by zombies, even if Daluo Jinxian comes down to earth, there is nothing you can do, and you will only die. In this case,

, the role of armor has become very limited.

If you want to protect your whole body, this pair of steel armor weighs more than fifty or sixty pounds. How can a soldier fight with it on? I'm afraid he will be exhausted in no time.

In the final analysis, it is the lack of human strength that leads to the inability to use this kind of steel armor that zombies cannot break. Strength has become the most critical issue, and the secret of crystallization lies in the ability to improve human beings themselves.

Various indices, such as strength...nerve response, etc.

The various color levels of crystals provide greater energy and are more stimulating to humans.

A third-level crystal, when its energy is released and penetrates into the human body, it will instantly cause the human body's DNA to produce an enhanced mutation behavior. This mutation will produce different results according to different abilities. 1

First-level crystals can provide three times the ability improvement of the human body, and second-level crystals can provide six times... If we continue to calculate this, the improvement of each level of crystals is three times, and each level will increase.

According to this principle, level nine crystals can instantly increase a person's strength by twenty-seven times... but is this really the case?

After a lot of experiments, Dr. Bai finally figured out that the use of crystals is not suitable for everyone. It has a critical point, and everyone has a tolerance point. Your physique and genes can only withstand one level.

The power of crystals is increased by three times. If you forcefully use the second-level crystals, your body will not be able to bear it, causing cracks and pains, etc., and may even bleed inside the cells. And if you forcefully use the third-level crystals,

With nine times the power, your end will definitely be miserable, because each cell that cannot bear it will burst under this power, and the whole body will explode, leaving no bones left.

Therefore, every soldier who uses crystals needs to be selected, and the tester developed by Dr. Bai is used to determine what level of crystals the soldier can use, what his endurance point is, and what level of crystals can be forcibly used in times of crisis.

crystallization without being fatal.

At the same time, the energy level of the crystal also represents the time during which its energy can be squandered. It does not mean that if you intensify the crystal energy, it can be used indefinitely. Energy has a time character and will be consumed at the same time, like a consumable.

.Once the crystallization energy is used up, it will break into powder and cannot be used again.

This characteristic of crystals is why generals try their best to store crystals. It is because of its non-reusability.

As long as they have seen the combat effectiveness of soldiers using crystals, no one will not go crazy for crystals. It is destined that humans will fight because of crystals, and the true value of crystals will be infinitely upgraded. At present, the mystery of crystals is not too clear yet

Many people know that the reserve of crystallization in the early stage has become extremely important. Whoever seizes the opportunity first will become proactive in the future... instead of passive.

This time, there were a thousand soldiers in actual combat. They wore armor specially built for them in the settlement. Their whole bodies were protected in steel armor, even the eyes were protected by bulletproof glass. Not to mention attacking,

Even the liquid sprayed by the monster cannot enter inside. The design of the steel armor has long taken this into consideration.

A thousand soldiers wearing armor stood majestically on the wall. The armor weighing thirty kilograms did not seem heavy at first, but as time went on, it would feel like it weighed a thousand catties.

Heavy. What's more, the weapon they used was not a gun, but a 2-meter-long sword that weighed nearly ten kilograms...

On the helmets of these one thousand soldiers, there is a large protruding point on the back of the head. A small stimulator is fixed to the helmet, and you can see the crystals of flowing energy inside. The physique of a thousand soldiers

All of them are the most powerful and can withstand the strengthening of the second-level crystals, so these thousand will be used for soldiers in actual combat. The activators are all made of second-level crystals.

The stimulator has several special transmission tubes connected to the soldier's neck. After the energy is destroyed, it is transmitted from the transmission tube into the human body for cells to absorb, thereby achieving the purpose of strengthening.

Crystals can strengthen soldiers, but they also have a big disadvantage, which is that once the energy of the crystals is consumed, the strengthening effect will recede. The sudden emptiness after this expansion will give cells a buffer that they cannot respond to.

Period, this buffer period will make the person who has used the enhancement become very weak. It will take at least half an hour to return to the normal state before using the crystal again.

At this time, a thousand soldiers who had been waiting for a long time, when Dr. Bai waved his hand, all put their backhands on the back of their heads and gently pressed the start button.

The working principle of the exciter is to use the sound captured by the destroyer to record the sound on the exciter. There is a small speaker built into the exciter. As soon as the sound inside is started, the sound will be accelerated through the reverberation pipe, thereby making the sound inside

The crystals are destroyed, releasing the energy inside the crystals. Once the energy is released, it will be injected into the soldiers, thereby strengthening the DNA.

Dr. Bai only uses this kind of enhanced material, but he can't figure out why these energies can have such a strengthening effect on the human body. His next research goal is to decipher these energy substances. As long as he deciphers

If successful, human beings will gain endless enhanced energy... no longer need to rely on crystals that will always be used up.

When a crystal is catastrophized, there will always be a burst of intense light. The activator fixes the position of the crystal. It is originally made of glass. Under transparency, the intense light of the crystal can be emitted. Just like this, a thousand soldiers are activated at the same time.

, even during the day, you can still see the spectacular blue light.

The blue crystal is a second-level crystal. It can strengthen the human body six times. It is already a very powerful ability. At least you can swing the 2-meter Yu Dao in your hand without any difficulty. The thirty kilograms of steel armor on your body,

It will also be as light and agile as the clothes.

The usage time of the crystal is ten minutes for the first level. Each time you upgrade the level, you will get five more minutes. The blue second level crystal can be used by soldiers for fifteen minutes.

As the crystallized energy was released, the soldiers were obviously shaken, and then they jumped crazily from the fifteen-meter-high wall one by one, directly falling into the dense crowd of zombies below. Powerful six times the ability

, making them indestructible. As soon as they entered the zombie group, the 2-meter-long sword in their hands began to dance wildly, splitting the circles of zombies in half.

Protected by steel armor, the surging zombies tried their best to attack them, but they would not cause harm. Each of the thousand soldiers was like a meat grinder. Wherever they went, the zombies were swept into two pieces.
To be continued...