I am reciting the Classic of Mountains and Seas in the interstellar

Stealth is invisible to the naked eye, but radar can capture signals. Most aircraft have this function.

Radar invisibility means that the eyes can see it, but the radar cannot capture the signal. For example, those drones that can fly at low altitude can bypass the radar search, but they cannot avoid people's eyes.

Some fighters with excellent performance can achieve both naked eye and radar stealth. They are truly stealth fighters.

But to achieve this effect, not only have special requirements for building materials, but also have very high requirements for various performance indicators of the equipment.

As far as the cost is concerned, it is definitely not within the reach of ordinary people.

Even among the four nobles, only two have a large "aircraft" that can achieve both naked eye and radar invisibility.

As Xia Chujian gradually got used to it, she discovered that her Shao Siming black silver mecha could freely choose between two stealth modes.

Invisible to the naked eye, invisible to radar, or both.

Xia Chujian chose the same time without hesitation this time.

At the same time, invisibility requires more energy and lasts for a short time. However, Xia Chujian doesn't care how much energy is used at this time. He just wants to be free and fly between heaven and earth as he pleases.

She passed between buildings, unable to be captured by any eyes or surveillance.

She even flew to the neighborhood next door to find the house Pingqiong bought.

Xia Chujian stopped at the window and looked for a while. It was dark inside and she couldn't see very clearly.

She turned on the infrared vision system on the helmet's eyepiece and found that the house was exactly the same as the day she and Ping Qiong visited the house.

There is no decoration yet...

She flew north to the outside of Mulan City, wanting to see her own land.

With the speed at which her master commanded the black and silver mecha, it only took a matter of minutes.

Ten minutes later, she floated above the high wall and took a deep breath.

Then, he flew around his own piece of land again. He didn't feel anything strange, and then he flew back leisurely.

On the way back, she slowed down, wanting to enjoy more the fresh air under the night sky.

Mulan City in the middle of the night is actually not peaceful.

In those shadowy parts of the streets, evil of all kinds is going on.

Xia Chu was expressionless when they met. He had dealt with three robbers, two murderers who were killing people, and a man with evil intentions because he was following a woman home from the night shift with a wet handkerchief in his hand.

Just when the man was about to cover the woman's face with the wet handkerchief from behind, Xia Chujian kicked him into the sky.

As for how he fell in the end and where he fell, it was none of her business.

The woman seemed to feel something, turned around in fear, and then ran faster.

Ahead, after the family members who came to pick her up met her, Xia Chujian left quietly.

By the time Xia Chujian returned home again, it was already three o'clock in the morning.

The early summer wind gently blew against her helmet.

Xia Chujian flew in gently and skillfully from the window.

Before he could take back his Shao Siming black silver mecha, he suddenly heard Liu Shun say at the door: "Master, there is something wrong with that big black dog opposite the door. It is already banging on the door."

Xia Chu saw that his heart skipped a beat.

She took a deep breath, and without taking back her Shao Siming black and silver mecha, she randomly pulled out a khaki work suit from the closet, put it on over the Shao Siming black and silver mecha, and then came out of the bedroom.

Liu Shun was stunned for a moment when he saw Xia Chujian's black and silver mecha helmet.

Its eyes flashed red, and after a while, it was sure that the person wearing a helmet in front of it was its owner.

Xia Chujian didn't care to hide her helmet in front of Liushun at this time, because this time, she didn't have to listen carefully to hear the movement on the other side.

At this time, the big black dog was not just barking, but actually banging on the door!

No matter how soundproofed the door is, it cannot block this physical movement.

Xia Chujian had an ominous premonition in his heart.

She rushed to the living room and opened the door.

Yes, the door in front of me was indeed shaken by the big black dog.

Xia Chujian immediately turned on the far-infrared night vision system function of Shao Siming's helmet's built-in eyepiece.

This function allows the helmet eyepiece to see through the far-infrared imaging system to see the scene behind the wall.

After opening it, she found that she could only see the entrance behind the door.

Behind the entrance, the far-infrared see-through function does not work.

Inside the entrance hall, the image of the big black dog desperately banging against the door appeared on the display screen of her helmet's eyepiece.

Xia Chujian immediately clenched his palm into a fist, knocked on the door lock, and said loudly: "Open the door, you can unlock the door from here."

The big black dog in the house heard it, and the crashing sound seemed to stop for a while. Then it seemed to understand what Xia Chujian meant, and began to stand upright on its two hind legs, and grabbed the door handle with its two front paws.

Not long after, there was a click, and the door was really opened by the big black dog!

It rushed out all of a sudden, and Xia Chujian quickly got out of the way, otherwise he would be hit by the big black dog.

But the big black dog didn't hide away from her like before. Instead, it barked at her even more loudly.

It seemed that some unforeseen horror was about to come.

Xia Chujian knows that some animals have an inexplicable premonition of natural disasters.

Could it be that the big black dog had a premonition of some natural disaster?

The first thing that came to Xia Chujian's mind was the earthquake.

Then I thought about my little dog, why didn't it feel anything?

Xia Chujian looked into the room while thinking wildly.

There was such a loud noise, but no one answered the door, not even a voice scolding the big black dog.

This isn't right.

Xia Chujian started to walk in and called tentatively: "Wangyou! Yu Wangyou! Mr. Yu! Mrs. Yu! Are you at home?"

She screamed a few times before remembering that she was still wearing the Shao Siming mecha helmet. It would be difficult to explain if the Yu family saw her.

But just when she was about to put the helmet away, a few lines of subtitles suddenly appeared on the helmet's eye display.

"Extra large doses of Teflon detected in the air."

"If you take off your helmet, you will be unconscious within three minutes."

"It is recommended not to remove your helmet."

Xia Chujian: "!!!"

Is there an overdose of Teflon in the air? !

Xia Chujian's chemistry scores were okay, but she vaguely remembered that Teflon is a volatile gas that can cause coma.

Since the intelligent system of the mecha says there is an extra large dose, then there must be an extra large dose!

Then the people from the Yu family...

Xia Chujian immediately stopped, and then a few lines of words appeared on the mecha's helmet eye display.

"More and thicker methane is detected in the air!"

"Danger! Danger! Danger!"

"Please leave the scene immediately! Please leave the scene immediately! Please leave the scene immediately!"

Methane? !

Xia Chujian used his decent knowledge of chemistry to know that this was the main component of natural gas.

What's going on tonight?

Focus on chemistry knowledge?

Xia Chujian muttered, feeling shocked and confused.

Because their building is an old building, it only has a very old natural gas pipeline system, which is our main energy source besides electricity.

For example, at Xia Chujian's home, Xia Yuanfang likes open fires when cooking and doesn't like using induction cookers, so their home also has natural gas.

Natural gas has a characteristic. When its concentration reaches 5% in the air, it will explode when exposed to an open flame...

Xia Chujian's expression changed drastically. When she quickly walked around the entrance hall and walked to the entrance of the Yu family's living room, the alarm prompts on the helmet display became increasingly dense.

"The methane content in the air is gradually increasing."

"We'll reach the breaking point in ten minutes."

"Please leave the scene immediately! Please leave the scene immediately! Please leave the scene immediately!"

Xia Chujian was already standing at the entrance of the Yu family's living room, staring blankly at the situation in the living room.

Yu Wangyou was sitting on the sofa in the living room, facing the entrance.

Her eyes were open, her face still had that miserable and unwilling expression of resentment, a trace of black blood flowed from the corner of her mouth, and there was an upside-down glass bottle at her hand.

Mr. Yu and Mrs. Yu were lying on the ground in front of her sofa, motionless and lifeless.

The particularly impressive nanny fell on her back near the floor-to-ceiling window. She seemed to want to escape, but she didn't show any signs of escaping.

In the blink of an eye, the big black dog turned back and pressed its head against Xia Chujian, trying to push her out.

The countdown was on the eyepiece display of Shao Siming's mecha helmet.

"There are still eight minutes left before the critical point."

Xia Chu was shocked when he saw it, and took a step back. No longer caring about the situation of the Yu family, he waved the big black dog away, turned around with a quick step, and returned to his home.

She rushed into Xia Yuanfang's bedroom and said urgently: "Aunt! Aunt! Wake up! Wake up! It's not safe here! Let's run away!"

But Xia Yuanfang was sleeping deeply and could not hear Xia Chujian's cry at all.

When Xia Chu saw him, he suddenly felt bad.

She rushed to Xia Yuanfang's bedside, tested her breathing with her hands, and found that she was still breathing slightly, and she breathed a sigh of relief.

But no matter how hard she pushed, Xia Yuanfang just couldn't wake up.

What else does Xia Chujian not understand at this time?

The eye display of her Shao Siming black silver mecha warned that the Teflon content in the air was not just in the Yu family!

Xia Yuanfang also passed out...

Seeing that Xia Chu was so worried, Xia Chu made a quick decision and said to Liushun who was standing at the door of Xia Yuanfang's bedroom: "Liu Shun, hug my aunt immediately, wrap her in a blanket, pick her up, and come out with me."

Then he picked up Wufu who was motionless next to Xia Yuanfang, bent down to pick up Sixi from the puppy's kennel, rushed back to his bedroom, pulled out his gun case from under the bed, and stuffed the house deed and land deed into the gun case. Carry it on your back.

Three minutes later, Xia Chujian rushed out of the house with a gun case on his back, Wufu in his arms, and Sixi in his arms.

Liushun's robotic arm held Xia Yuanfang, who was wrapped in a blanket, and followed Xia Chujian out of the door.

When going out, he didn't forget to close the door tightly.

Xia Chujian ran to the elevator and glanced at the two elevators.

She chose the newly installed elevator in the building.

The quality of this elevator is much better than that old elevator, and it is very fast. It only stops on the first floor and the top floor, which is a dedicated elevator for them on the top floor.

After she came in, Liushun's two robotic arms slid in with Xia Yuanfang wrapped in a blanket.

And the big black dog that had been circling in front of the elevator door followed him with his tail between his legs.

It didn't dare to get close to Xia Chujian and Liushun, but hid in the corner on the other side of the elevator.

Xia Chujian thought of its warning just now and didn't chase it out, then pressed the button to go to the first floor.

At this time, the countdown in the helmet's eyepiece was only one minute.

The elevator sank rapidly.

But the speed is still not fast enough.

The explosion sound was like a huge wave on the sea, rolling over.

The shock wave penetrated the entire building from top to bottom.

The fire started raging from the top floor, with black smoke raging and flames shooting into the sky.

From the outside, the building looks like a giant torch.

Just when the elevator descended to the third floor, the deafening explosion from the top floor was already coming all the way down, as if chasing a soul for its life, coming straight towards it!

Xia Chujian heard a series of rumbling noises coming from upstairs, and various thoughts quickly flashed through his mind, trying to figure out how to save himself.

At this moment, the elevator has just descended to the third floor, and it will take three seconds to reach the first floor.

But the explosion was so fast and violent that they might not be able to wait for them to get to the first floor before escaping...

Xia Chujian regretted taking the elevator, but if they had not taken the elevator, the explosion from above would have directly buried them in the stairwell.

Xia Chujian no longer hesitated, turned around and arched his body, put it on Liu Shun's cylindrical shoulders, and hugged Liu Shun together, as if they had set up a small tent to cover the unconscious Xia Yuanfang, Si Xi and Wu Fu. In this little tent.

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There will be an update at 05:00 in the evening.