"Emergency power is on."

"Emergency internal communication channel is on."

"Emergency defense is on."

"Ventilation system is on."

"Radiation defense window is down."

"All departments please stay where you are."

In the corridor, amidst the hustle and bustle of footsteps and shouts, the radio is turned on, and then there is the sound of machinery, but it is replaced by a female voice.

As the voice falls, dull "clang clang" sounds start from all directions. An Zhe looked at the corridor again. The cold steel curtain wall suddenly fell down, covering all the windows. It looked very thick. He remembered what Shi Xiao said. Once the magnetic field disappeared, the rays and solar wind from the universe would immediately hit the surface of the earth.

So he knew that Lu Xun had just dragged him away from the corridor and away from the range where cosmic radiation might reach. As a building in the peak era of human technology, the thickness of the wall and the special material of the main city could defend against radiation attacks.

The lights on the top floor of the United Front Center flickered wildly before lighting up again, but this time the lights were much weaker than before, presenting a kind of powerless and miserable whiteness.

The sound of a researcher dialing the phone came from the nearest laboratory. He was so anxious that his voice was loud that it could be heard throughout the corridor.

"D1342, please increase the power supply! The instrument cannot stop!"

A voice also came from another laboratory: "D1343, please provide emergency power, otherwise the precious samples will be revived."

An Zhe knew who would answer their request and whether it would be satisfied. He looked in the direction of D1344 and subconsciously grabbed the corner of Lu Xun's sleeve.

Lu Xun looked down at him and said, "It's okay."

An Zhe nodded.

The radio continued to broadcast.

"Please ask the Equipment Center, City Defense Station, Emergency Response Department, and Logistics Supply Department to go to the first meeting room on the 17th floor of the United Front. Please take the elevator and use the emergency passage to go up and down the stairs."

"Please ask the Lighthouse Magnetic Field Observation Department to contact the United Front Center immediately."

"Please ask the Lighthouse Magnetic Field Observation Department to contact the United Front Center immediately."

The radio volume was turned up to the maximum, and the lingering sound echoed in the corridor.

An Zhe looked at Lu Xun: "Are we going back to the lighthouse?"

"I'm waiting for orders," Lu Xun looked at the other end of the corridor bridge, as if thinking about something, and then his gaze returned to An Zhe: "Don't run around, follow me."

An Zhe said: "Okay."

Then he heard the broadcast: "Command Office, Joint Staff Department, Trial Court, and Operations Center are responsible for going to the Communications Center on the 14th floor of the United Front. Please take the elevator and use the emergency passage to go up and down the stairs."

As soon as Lu Xun entered the door of the communications center, An Zhe heard the voice inside. "North Base calling Underground Base, please answer if you hear me." "North Base calling Underground Base, please answer if you hear me."

" North Base calling Underground Base, please answer if you hear me." The communicator was wearing a pair of sleek black headphones and talking. Several display screens were unfolded in front of him, and some curves and parameters were jumping. However, he was the only one talking in this communication channel, and only empty current noise came from the other side. In the center of the hall was a middle-aged man in a black military uniform. He had a stern appearance and a dignified look. The insignia on his shoulder straps indicated that he was a lieutenant general. Seeing Lu Xun coming in, he nodded slightly: "You come."

There were other military officers who came in before and after Lu Xun, with different military titles and departments, but they all looked stern and solemn.

There were chairs in the communication room, and they sat down in different places, with An Zhe sitting quietly next to Lu Xun.

The lieutenant general received a call, and just a few seconds later, he hung up and said to the officers in the hall: "According to the notice from the Magnetic Field Observation Office of the Lighthouse, the global magnetic field strength dropped to 0 a few minutes ago, but there was no abnormality in the eastern magnetic pole we protected."

"Obviously, there is a serious fault in the western magnetic pole on the other side."

An Zhe listened to the lieutenant general's words. He knew the significance of magnetic poles to human beings.

The magnetic field protects everything on the earth. Once it is removed, cosmic rays and solar winds will drive straight in, which will cause a large-scale drought in the entire world in a short period of time. Humans exposed to the radiation will suffer from various malignant diseases and then die or mutate. If there is no magnetic field protection for a long time, the entire earth's atmosphere will be blown away by the solar wind, and then this world will become a dead desert.

The two magnetic poles made by humans are located in the North Base and the Underground Base. Together, they maintain a weak magnetic field covering the entire world. They are separable. Once one of them has a problem, the other will also stop working.

They also need redundant communication. Every night, the aurora appears in the sky, telling each other that we still exist and are still safe.

Now the aurora disappears.

At this time, the operator who was debugging the equipment said, "Report. The artificial magnetic field has disappeared, the ionosphere is in chaos, and shortwave communication is feasible."

The lieutenant general frowned, and after a few seconds of silence, he said, "At all costs, turn on very long wave communication."

"Yes!"

In the era when humans went to satellites and ground relay stations, long-distance communications became extremely difficult and could only be done through radio - radio shortwave communications transmit signals through the ionosphere in the atmosphere. However, the artificial magnetic field is weaker than the original geomagnetic field after all, and the communication was originally very stable. Now the magnetic field has completely disappeared, the ionosphere is completely in chaos, and communication is even more difficult.

——Very long wave communication is different. It is ground-to-ground, using ground seawater as a medium. It is stable and reliable, but the startup cost is high, and only the oldest code can be used to transmit messages.

At the same time, it is one-way. This means that unless the other party happens to turn on very long wave communication at this time, there is no way to communicate.

The message was passed down layer by layer, and finally, the communication center received feedback that the very long wave communication device had been turned on.

The radio operator picked up the instrument, and the code with the same interval length sent a monotonous "beep" sound, which was entered into the system in turn and then uploaded to the communication channel.

"North Base calling the Underground City Base, please answer when you hear it."

A long silence.

"The underground city base is the most well-built of the four types of bases. It's hard to imagine that it would encounter a disaster." An officer said, "I hope it's just a failure of the equipment."

As soon as he finished speaking, a harsh current noise suddenly sounded from the receiving device!

The rustling and crackling sounds were so chaotic that they seemed to come from the boundless universe, like the dying breath of a dead monster.

Everyone in the room held their breath until a few seconds passed.

"Beep."

"Beep beep."

"Beep, beep--"

The telegraph sounded, and the transmitter's body trembled, almost falling on the workbench, and quickly recorded.

A few minutes later, the lieutenant general asked, "What did they say?"

The radio operator was pale and his lips were trembling. He looked at the paper recording the signal and said, "They said... the underground city base... was invaded by a joint alien species and suffered heavy damage. We are... resisting and repairing the magnetic poles."

"The ammunition reserves are already one-tenth full... the thermonuclear weapons reserves are exhausted, the troops are insufficient, please..." He gritted his teeth and said, "Request support."

There was silence.