Apocalypse Rebirth: 3000 million won at the beginning

It was freezing cold, and snowflakes were falling.

Camphor Tree Base.

Edge City.

Several buses were driving behind a snowplow. After several days of continuous snowfall, the snow on the ground was getting thicker and thicker, so the big camphor tree had to start the snowplow to clear the snow.

These buses were painted yellow and had "school bus" signs on both sides.

The bus pulled up to the bus stop outside the residential area on the outskirts of the city and stopped.

At the bus stop, there were hundreds of students and their parents, all bundled up tightly. Upon seeing the bus, they quickly went to queue up.

"Xiao Gou, the school bus has arrived. You should go to school now. I'll pick you up here tonight." A middle-aged woman, who looked to be in her forties, said to a little girl who looked to be only eight or nine years old.

The little girl's nose was red from the cold, and she breathed out warm air as she responded somewhat indifferently:

"No need, I know how to get back myself."

After saying that, she turned around and followed the crowd to the car without looking back.

The middle-aged woman watched the little girl's departing figure and sighed softly. She used to be quite sensible when she was little, but now she gradually couldn't understand what the child was thinking.

One by one, the students boarded the buses, and several buses started moving, heading towards the school in the outlying city.

目前整个大樟树总部基地，18岁以下的人共有7万人，其中6~18岁的适龄上学人口共有3万人。

This percentage is only 6% compared to the base population of 500,000 in the headquarters area.

In a post-apocalyptic country, the population under 18 years old would account for at least 20%.

The reason why the proportion is so low is mainly because the survivors who have flowed into the Big Camphor Tree Base in the past year are mostly adults, and very few survivors outside choose to reproduce.

Therefore, these survivors who flocked in lowered the overall percentage of the population under 18 years old in Dazhangshu.

However, due to the encouragement of childbirth and the introduction of a series of policies in recent years, the birth rate in Dazhangshu is steadily increasing.

Although there don't seem to be many students now, the increase in the birth rate will lead to a surge in the number of students over time, but this will take time.

Thirty thousand students were distributed among the outer city, buffer city, first and second outer cities, and inner city of Dazhangshu.

Currently, according to the school system, there are primary schools, secondary schools, and senior schools.

Primary school is 5 years, secondary school is 3 years, and senior school is 4 years.

The headquarters base in Dazhangshu has a total of 8 primary schools, 3 intermediate schools and 1 senior school.

These schools are scattered throughout the headquarters base in Dazhangshu, and their teaching quality varies.

Schools located in buffer cities are naturally better than those in peripheral cities.

but
Currently, whether at the headquarters or other branch bases in Dazhangshu, free education is being implemented.

Tuition fees, textbook fees, and other expenses are all waived.

Second outer city.

Old Zhou, along with Ding Zhao and Xue Zhihua from the Military Industry Department, have been staying at the zombie research institute for two days.

For the past two days, they have been immersed in the zombie research institute, without ever leaving it.

Inside the institute.

Old Zhou rubbed his red eyes and said to Bai Jie:

"The sound of these tunneling zombies digging into the ground with their claws is not infrasound, but only low-frequency sound waves. After two days of repeated testing of these four tunneling zombies, the low-frequency sound waves they emit remain between 49.4 and 50 Hz."

Upon hearing this, Bai Jie quickly said:
"Could the claws of these tunnel zombies be broken through the resonance frequency?"

As she spoke, she took out a zombie research report, placed it in front of Lao Zhou, flipped to a page, pointed to the enlarged image of a zombie's claw on the page, and continued:

"We discovered that although these tunneling corpses have extremely tough claws, they have a structural weakness. Their long-term digging has caused extremely fine cracks to appear in the keratin layer at the tips and roots of their claws. Do you think the discovery of these cracks will be helpful?"

"However, these cracks are too small."

Old Zhou suddenly stepped forward, zoomed in on the picture on the iPad, and examined it repeatedly for a while.

With a joyful expression, he asked Bai Jie:

"Does every tunnel zombie have this kind of crack?"

Seeing the joy on his face, Bai Jie nodded slightly and said:

Yes, how so?

Old Zhou smiled and took out a pack of cigarettes from his pocket. Just as he was about to light it, he suddenly realized that he was in a zombie research institute.

No-smoking areas.

He then sheepishly put it away.

Then continued:

"Minister Bai, your method of breaking the claws through resonance is feasible! These cracks can become the breakthrough point for stress concentration during resonance."

"The 50 Hz low-frequency sound wave has strong penetrating power and can travel along the ground to the claws of the tunnel corpse. Although the claws are extremely hard as a whole, the vibration amplitude at the cracks will be amplified by tens or even hundreds of times."

Under repeated resonance, the cracks gradually widen, and eventually the Tunnel Corpse Claw will shatter from the inside.

After hearing his remarks, the surrounding crowd gathered around.

He couldn't smoke, so he held the cigarette to his nose and sniffed it, continuing to speak as he walked:
"Let me give you an example to help you understand."

"It's like hitting a cracked stone with a hammer; the crack will get bigger and bigger until the stone breaks completely."

The same high-emphasis low-frequency sound waves emitted by us have a similar effect on zombies!

Maddie, standing nearby, asked excitedly:

"How exactly do you do it? Can you make this device that emits low-frequency sound waves?"

"Um," Old Zhou pondered for a moment, then looked troubled.

Seeing the troubled look on his face, the people around him were somewhat disheartened.

These past two days everyone has been studying the tunnel corpse thoroughly, but is there still no solution?

Unexpectedly.

Old Zhou said with a grin:

"It's simple. We can easily develop a device that emits 50 Hz with the capabilities of our military industry department."

"Here's how it's done:"

The first step is to create a device that accurately emits this frequency. We can modify an existing sound wave transmitter, which has relatively high power.

The second step involved using an acoustic detector to pinpoint the exact location of the body in the tunnel.

The third step is to precisely aim the transmitter at this location. The sound waves travel through the soil to the zombie's claws. When the frequencies match, the claws begin to tremble, the cracks widen, and they eventually break apart.

After listening to his story, Bai Jie wasn't particularly happy. Instead, she lowered her head and pondered for a moment before frowning and asking:
"50 Hz is within the range of human hearing. How much intensity would be needed to have an effect?"

"At least 120 decibels, and for better results it might reach 150 decibels," Lao Zhou replied.

Bai Jie and Ma Di both gasped upon hearing this.

What does 120 decibels mean?
That's equivalent to the sound of a jet plane taking off and landing right next to your ear, or the sound system of a large concert right next to you. Such high intensity can even shake objects.

"This will also harm our combat personnel!" Bai Jie said helplessly.
"Although I don't know much about the field of sound waves, this kind of low-frequency sound wave is different from high-frequency sound waves. The direction of propagation of low-frequency sound waves is not as concentrated as that of high-frequency sound waves; it spreads in all directions."

Especially with a high-intensity audio level of 150 decibels, even standing behind the transmitter, your body would still feel the vibrations through the air and the ground.

Old Zhou waved his hand, indicating that it wasn't a big problem.

laughed:

"That's why I said earlier that we must accurately locate the tunnel corpse. This is not suitable for large-scale indiscriminate use; it is only suitable for use after precise positioning. It needs to be used in conjunction with an acoustic detector."

"In addition, the operator of this low-frequency sound wave transmitter can wear military-grade noise-canceling headphones and a protective suit with soundproof inner lining. Double protection should be no problem!" "Most importantly, for this directional low-frequency sound wave transmitter, I will design and manufacture a long cylindrical sound wave focuser. The entire body of the cylinder will be wrapped in metal. The front section is a gradually expanding horn for focusing the sound, and the rear section will shrink into a handle shape with shock-absorbing rubber added to the handle."

In this way, the energy of low-frequency sound waves that spread outwards can be reduced.

Furthermore, it allows for more precise attacks on the tunnel corpses.

Seeing his confident demeanor, Bai Jie nodded and said:

"Alright, come with me to the administration building and tell the leaders this good news."

"No problem." Old Zhou was getting a little tired of staying in this zombie research institute.

Unlike the military research institute, smoking is prohibited throughout the entire zombie research building here, unlike their military research building which is more relaxed.

Afterwards, Bai Jie and Lao Zhou left the zombie research institute.

As soon as he stepped out of the zombie research institute, Old Zhou couldn't wait to light a cigarette, sit in the car, and start puffing away.

A few minutes later.

The vehicle arrived at the administration building.

The administration building is also located in the second outer city, very close to the zombie research institute.

The two hurried to the command center.

Currently, with the zombie horde attacking from the sea fog, most of the high-ranking officials of the Big Camphor Tree are gathered here to direct the battle.

The communications department is located next to the command center. In the event of any action orders or any movement, the communications department can transmit the information in and out as quickly as possible.

Tuk Tuk——

Bai Jie knocked on the door of the command hall.

A strong, resonant voice came from inside: "Come in."

Bai Jie came in first, followed by Lao Zhou, and the two of them entered together.

In the center of the command hall are several giant sand tables, which are miniature versions of the various bases in Dazhangshu.

The sand table shows the terrain and topography of each base, as well as the buildings on the base.

There were more than a dozen people in the command center.

Uncle Liu Jianwen had just returned from the outskirts of the city. Upon seeing Bai Jie, he quickly asked:
"How's it going? Any breakthrough in dealing with the tunnel zombies?"

Bai Jie nodded. "There's been a breakthrough."

She looked at Lao Zhou and said, "Lao Zhou, you know better than anyone else, why don't you talk to the leaders?"

Old Zhou, with a cigarette dangling from his mouth, repeated what he and Bai Jie had just discussed.

Old Zhou started smoking, but no one reacted.

Almost everyone in the command center smokes, and the room is filled with the smell of smoke.

After hearing Lao Zhou's story, everyone's faces lit up with joy.

The eldest uncle, Liu Jianwen, asked even more excitedly:

"How long will it take to build this sonic resonator emitter and that sonic focusing device you mentioned?"

Old Zhou held up one finger, "One day."

"Our base already has a sound wave transmitter, but it needs to be adjusted and modified, mainly the long cylindrical sound wave concentrator. It will probably take some time, otherwise it can be done in two hours."

The Military Industry Department has several separate factories that are not under the management of the industrial sector.

Therefore, the design and manufacture of these things did not need to go through other factories; the military industry department could handle it all on its own.

Upon hearing that a solution had been found for the tunnel corpse, Li Yu naturally didn't delay.

Issue the order immediately:

"Okay, Lao Zhou, you're in charge of the sound wave transmitter, the long cylindrical sound wave gatherer, and the protective suit. Once they're manufactured successfully in 24 hours, take them to Edge City for testing immediately."

"Tomorrow, all the mobile guillotine blades in Edge City will be replaced with the latest guillotine blades. If the launcher tests prove successful, then we can reduce the firepower output from the fortress."

"Yes, I understand!" Old Zhou quickly replied.

"Then go and take care of it now," Li Yu said to Lao Zhou.

"Okay." Old Zhou didn't waste any time and turned to leave.

In recent days, due to the presence of the King Kong zombies and the problem of broken tungsten steel alloy shunts, the defensive capabilities of the intelligent moving shunts have been weakened.

In addition, the appearance of tunnel zombies has put enormous pressure on the headquarters base.

In order to protect the headquarters, the twelve fortified fortresses were fully deployed, forming a massive fire network that kept most of the zombies outside out of reach.

Try to keep zombies away from the headquarters.

They even tried to clear out the zombies outside the outskirts of the city.

However, this maximum firepower output consumes a huge amount of ammunition, especially solid napalm bombs, and the stockpile has been decreasing in recent days.

The battle between the sea fog and the zombies is a protracted war.

This can't go on.

That's why Li Yu was so eager to have Lao Zhou manufacture this sound wave transmitter.

After Lao Zhou left, Li Yu looked at Bai Jie, who was still in the command hall, and thought of the underground secret research institute far away from the big camphor tree.

That project specifically uses zombie evolution to study human enhancement.

"Minister Bai, how's the situation with Zhao Ke?"

Bai Jie shook her head and said, "We're still stuck at that step; there hasn't been much of a breakthrough yet."

Li Yu wasn't surprised, since he hadn't had high hopes for this project to begin with.

However, projects that can change the current state of humanity should always be supported.

"Are Zhao Ke and his team lacking supplies and test subjects?"

Bai Jie replied:
"We don't need them for now. Before the sea fog arrived, the logistics department had already sent a lot of supplies, enough to support them for six months. We also have enough experimental subjects for now."

Li Yu nodded:

"Yes, let Zhao Ke take his time. There's no rush for this project. Just let him do his best."

"Yes, sir." Bai Jie glanced at the others in the command hall and said:

"Commander, I'll head back to the zombie research institute now. We caught a few more new types of zombies today, and I need to go back and take a look."

"Okay." Li Yu waved his hand.

Bai Jie left.

After Bai Jie left, Li Yu looked at Liu Jianwen.

"Uncle, according to the information Xiao Jun and the judge gave us before, there are giant zombies similar to giant squid. This sea fog has lasted for a week, but the giant animal zombies have not yet appeared."

However, these giant sea monster zombies might also appear later; remind the fortress defenses to be careful.

Liu Jianwen nodded: "Okay."

He had also seen photos and videos of the giant squid zombie.

A giant squid zombie with tentacles tens of meters long could potentially entangle a city fortress.

Therefore, when the giant squid zombie arrives, you must not extend or retract the battle platform of the fortress, otherwise the people on the battle platform may be swept off by the giant squid.

Only when the city fortress is in closed defense mode will the people on it be relatively safe.

(End of this chapter)