Planet Builder

Busan, Korea's first port and second largest city, was once one of the busiest ports in the world.

But in Busan at this time, there is not a single cargo ship coming and going at the port; in the city, there are no congested streets; in the high-rise buildings, there are no noisy crowds.

Instead, there are various warships, armored vehicles, ground artillery, and temporary military fortifications.

The crowd has already evacuated to the nearby area, which is about to become a battlefield for humans and Zerg.

The eyes of the world converged here again. The last defeat happened just a day ago.

And the industrial strength of Sakura Country is stronger than that of Goryeo. Even with the help of White Eagle, can they really hold on?

In the combat headquarters, the commanders are urgently discussing countermeasures. The experience of yesterday's other war is immediately applicable today.

How to block the attack of the three beetles became the main point of their discussion.

"The defense of beetles is amazing. In close-range offensive and defensive battles, tank shrapnel and armor-piercing shells are more effective in killing beetles than short-range missiles. We need to reserve a large amount of armor-piercing shells and armor-piercing shells."

...

He Xingzhou did not pay attention to this war, because the bugs were also approaching the magic capital. At the current speed, within 15 days, they will be able to invade the city!

At this time, most of the steel Great Wall in the Modu section has been built, and it should be barely completed in 15 days.

This is not enough!

Thousands of red beetles, blue beetles, plus a hundred black beetles, with mutant creatures, broke through the defense of Choshi District.

What if there are more and stronger Zerg coming to the magic capital?

"There is no problem with the Great Wall of Steel blocking mutant creatures and first- and second-level Zerg." He Xingzhou thought to himself, "Three-level Zerg is somewhat difficult, fourth- and fifth-level Zerg, such as the black beetle. Cannonballs and missiles alone, Not necessarily!"

"In case there are other more advanced Zerg... the risk is too great! We must upgrade our weapons and equipment as soon as possible."

The research and development of weapons in the Xuanwu Project had already begun. He Xingzhou originally wanted to improve the laser weapon first, but the appearance of the beetle made him change his mind. He wanted to improve the electromagnetic gun first!

The advantages of laser weapons and electromagnetic weapons are different. If you are fighting a level-5 black beetle, the laser weapon needs to burn it for a few seconds before it can be burned to death.

The kind of laser weapon that can instantly vaporize it is naturally impossible to create now.

The electromagnetic gun can obtain great kinetic energy in a very short period of time, even a 50-meter-thick steel plate can smash a big hole! It hits an instant burst, while laser weapons are more like continuous output.

"In coastal defense warfare, although laser weapons have a long attack distance, they are easily affected by sea water and weather, and they cannot kill beetles instantly. In contrast, electromagnetic guns are now more lethal to beetles."

He Xingzhou analyzed it and decided to improve the electromagnetic gun first.

He called out the quantum light brain and opened the weapon technology tree.

"Unlocking the basic induction electromagnetic gun requires 300,000 units of energy."

"Unlocking the basic electromagnetic railgun requires 500,000 units of energy."

"Unlocking the basic plasma electric heat gun requires 700,000 units of energy."

"Unlocking the basic electromagnetic heavy (two sounds) to connect the gun requires 1 million units of energy."

Among them, the basic induction electromagnetic gun, Shenzhou has mastered the relevant technology, He Xingzhou directly entered the information, and it has been unlocked.

However, this kind of electromagnetic gun is fixed in the barrel with an accelerating coil. When it is passed through an alternating current, the generated alternating magnetic field will induce an electric current in the projectile coil. The magnetic field of the induced current interacts with the magnetic field of the accelerating coil current to generate an electromagnetic force that accelerates the projectile and launches it.

The electromagnetic rail gun is to lay electromagnetic rails, and after the current is applied, the rails generate a strong magnetic field. Under the action of the ampere force of the energized slider, the projectile will be shot at a great speed, theoretically even reaching sub-light speed.

The lethality of the electromagnetic railgun is also very strong, but if it is to be manufactured now, it will face a problem, that is, the ultra-high lethality requires a longer acceleration track.

The plasma electric heat gun uses high-pressure plasma heating to push the projectile forward.

As for the final electromagnetic reconnection gun, its principle is the same as the coil gun, but it uses another method of continuous reconnection.

It combines the advantages of coil cannons that can launch high-quality projectiles and rail guns that can launch ultra-high-speed projectiles, and can give the cannonball a higher peak acceleration force, making it more powerful!

At present, the mainstream in the world are induction electromagnetic guns and electromagnetic rail guns, and there is no mature electromagnetic reconnection gun.

He Xingzhou unlocked all four types of electromagnetic guns in one breath. These electromagnetic guns are used in different scenarios. One is stronger than the other, but the difficulty of manufacturing is different.

In the current situation, the most suitable one is the electromagnetic reconnection gun, which is more powerful and does not need to create an ultra-long electromagnetic track for the time being. Its gun turret is a cuboid structure and can be manufactured in a short time.

Recently, the unit energy of the quantum optical brain is still sufficient, because a nuclear power plant has been built on the route of the Great Steel Wall, and He Xingzhou has obtained a new energy source.

He Xingzhou digested and understood this information, and directly contacted the Institute of Electromagnetic Weapons in the cloud, and pulled the team responsible for researching electromagnetic guns into the channel.

"Everyone, I found a way to design an induction electromagnetic gun!" He Xingzhou said.

"What method?" asked Bao Xiangbei, the team leader. He is an expert in electromagnetic weapons and has led the team to design a number of electromagnetic weapons.

He Xingzhou said: "The two positions are designed to consist of upper and lower rectangular coaxial coils, with a gap in between. The emitter is a cuboid, which can pass through the gap between the two coils for accelerated motion."

"Because the projectile carries a continuous current, the magnetic field generated by the projectile seems to "cut off" the magnetic field of the acceleration coil when it passes through the acceleration coil, and then abstractly reconnects with the magnetic field of the next coil."

"In this process of repeated reconnection, the projectile is continuously accelerated, and at the same time, the advantages of the induction electromagnetic gun and the electromagnetic rail gun are obtained!"

Everyone understands the principle, and He Xingzhou sent a structural diagram he designed.

This is a columnar electromagnetic reconnection gun, which is mainly a columnar armature, and the armature is wound by a columnar asynchronous induction coil.

By controlling the current, the effects of electromagnetic acceleration and magnetic field reconnection are achieved.

"This design, if we can accurately control each reconnection! Then the projectile can continue to accelerate in a small volume, and finally achieve the same effect as the ultra-long-distance electromagnetic railgun!" Bao Xiangbei said, "We have to try it immediately. a bit!"

He Xingzhou said: "It's best to make samples immediately. If the test is successful, mass production will be sent to the front line immediately!"

Bao Xiangbei also knew that it was a time war, and it was time to race against time.

He immediately said: "We will start now, and once the test is successful, start manufacturing immediately!"

...

When they were studying the electromagnetic reconnection gun, the battle in Busan had already started.

The previous process was similar to that in the Choshi area of ​​Sakura Island. The Zerg first used low-level mutant creatures to attract artillery fire, and when the consumption was almost done, they sent beetles to land.

Because of their previous experience, they were not so embarrassed to deal with this time.

The specially equipped tank armor-piercing and armor-piercing rounds deal a lot of damage to the beetles, but when the black beetles land, the tank armor-piercing and armor-piercing rounds will also have limited damage to them.

At the mouth of the sea, the Zerg attacked the fleet, and several warships were destroyed.

"Hold on for another half an hour, the mutant creatures are almost dead!" Commander Jin Chenghuan shouted in the headquarters.

"Be sure to defend the coastline!"

The first batch of black beetles that landed were killed in half by them, and there were only less than fifty left. If they survived, they would still have a chance to hold on.

But a desperate thing happened. Originally they thought there would only be a group of black beetles, but in the ocean, a new big black spot appeared, a group of more black beetles appeared, and behind them were all kinds of red beetles, Green beetles, it is estimated that there are six or seven thousand in total.

In that scene, it was like countless heavy armored vehicles charging the defensive line!

Underwater, those giant Zerg are also attacking the defense line.

The drone photographed that a tentacle with a length of tens of meters appeared in the water, tied a small ship, and pulled it directly into the sea!

"Boom!" A Tomahawk cruise missile hit it, and a large scarlet appeared in the ocean, but the guy didn't come up, but disappeared into the water.

In the deep water, the monsters slammed into the underwater interception net frantically, and some even had their own electric current. The interception net had collapsed and the sea entrance was broken.

The commander of the White Eagle looked at the line of defense and said, "Let's retreat, our missiles are ready."

"Retreat!" After Jin Chenghuan ordered, the whole person seemed to have lost his strength.

This is Busan! Unlike the Choshi District of Sakurajima, even if all the beetles are killed after retreating to the land line, the city will suffer heavy losses!

And the monsters have opened the sea entrance, starting from the Nakdong River, they will enter the island.

Greater disaster and chaos is coming!

Their soldiers retreated to the land defense line, and countless missiles fell, blowing up the Zerg around the coast defense line!

Along with it, it was reduced to ashes, as well as the once prosperous first port on the island!

"Busan has fallen!" At this moment, countless islanders were crying.

"Our home is gone!"

"The Zerg has entered the river and will reach the inland!"

"What shall we do in the future?"

No one can give the answer... After the broken arm to survive, they are greeted by more confusion and fear!

...

"Twice, two coastal defenses, all failed!" The entire human world was shaken by this!

These two places, although small in size, are among the top industrial and technological powerhouses in the world.

With their military strength, they are still unable to hold the entrance to the sea in front of the Zerg.

If the Zerg land from somewhere else, can they hold it?

Pessimism spread in human society, and some people even began to feel despair, preaching the end of the day, saying that they would give up resistance, or go to heaven in advance before the arrival of the Zerg.

Others began to indulge, and instead of being wiped out by the Zerg, it was better to be happy for a while before they died.

Some people and organizations have also begun to call on all human beings to unite against the Zerg! Develop more advanced military technology and more.

Various phenomena emerge in an endless stream.

A piece of news brought the world's attention to China again.

"The third Zerg is approaching the magic capital of Shenzhou! I'm afraid it will land in ten days!" International media reported the news.

"No way! Humans are not the opponents of the Zerg at all, hurry up and escape!"

"Learn from the experience of the previous two times, you can just give up the magic capital and use missiles to kill the Zerg!"

"The end of the world has come, and only those who believe in the god of Oran can find shelter and deliverance!"

"Humanity has completely abandoned the ocean and retreated to the interior!"

"Hey, this time, a lot of people are going to die again!"

There is a lot of pessimistic news.

Because of the two failures, even the netizens in China felt the oppression of the Zerg.

They couldn't help but wonder, "Can we really hold on?"

Another news came. It is said that the number of Zerg who attacked the magic capital this time is larger than the number of the two Zerg who fought before, and it is more than the sum of them.

This news makes people restless.

"So many Zerg, what should I do?"

"The devil must not lose, otherwise the Zerg will soon spread to the whole country through the Yangtze River!"

"On land, even if there are Zerg and mutant creatures, we can hunt and kill them. But if it's in the river, how can we catch them?"

"There are more than 20 million people in the devil, how to retreat? And it is one of our economic centers. If we go to Choshi and Busan once, we will be hit hard!"

People all over the country are paying attention to the magic capital.

At this time, the Xuanwu executives released a message: "After the day and night struggles of the masses and soldiers, we have completed the construction of the Great Steel Wall along the coast of Modu."

"The Great Steel Wall is ready for use, and we will protect the safety of the magic capital!"

As soon as the news came out, people were immediately excited a lot.

"It was built so quickly! What a miracle!"

"We have the Great Wall of Steel and shouldn't fail like they did!"

"The Great Steel Wall will be tested before it is built. I hope it will become a solid barrier for us!"

"@Magic City, come on, we are with you!"

...

The Zerg swarm is getting closer and closer. Near the sea, the Xuanwu troops dispatched ships and fighter jets to bombard them every day, trying to reduce the number of mutant creatures and Zerg as much as possible.

At the Institute of Electromagnetic Weapons, the electromagnetic reconnection gun designed by He Xingzhou was successfully tested and delivered to manufacture urgently.

He Xingzhou requested that at least 100 electromagnetic reconnection guns be built within ten days.

In addition, he also specially designed a large multi-stage electromagnetic reattachment gun, which uses the superposition of magnetic fields to double the thrust of the projectile, and the power will be dozens of times more than those of the single-stage electromagnetic reattachment gun!

In order to make it manufactured before the battle, He Xingzhou personally went to the military factory to guide the manufacturing process.

Eight days later, the magic capital.

Most of the high-rise buildings in the magic capital by the sea have long been empty and people have been evacuated.

And the huge city circle of the magic capital, naturally, there is no way to withdraw all of it, and most areas still have to live and work normally.

At five o'clock in the morning, many people were still sleeping in their sleep. At this time, a harsh siren cut through the sky, followed by the same sound in all the streets, communities, and houses.

This is an air defense siren, and, this is not a drill!

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