Invisible to the naked eye, it is invisible to the eye, but the radar is able to capture the signal, and the vast majority of aircraft have this function.

Radar stealth is that the eye can see, but the radar cannot capture the signal, such as those drones that can fly at low altitudes, they can bypass the radar search, but they can't avoid people's eyes.

And some fighters with excellent performance can achieve both naked eye stealth and radar stealth, which is a veritable stealth fighter.

However, in order to achieve this effect, there are not only special requirements for building materials, but also quite high requirements for various performance indicators of equipment.

As far as the cost is concerned, it is definitely not something that ordinary people can afford.

Even if there are four nobles, there are only two nobles, and they have a large "flying machine" that can achieve naked eye stealth and radar stealth at the same time.

And Xia Chujian, in the gradual exploration of habits, found that her young master black and silver mecha can freely choose two stealth modes.

Naked eye stealth, radar stealth, or both.

Xia Chujian did not hesitate to choose the same time this time.

At the same time, stealth requires more energy and lasts for a short time, but Xia Chujian doesn't care about how much energy he will use at this time, he just wants to be free and fly between heaven and earth as he wants.

She swept from building to building, unable to be caught by any gaze or surveillance.

She even flew to the neighborhood next door and found the house that Ping Qiong bought.

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

She turned on the infrared fluoroscopy system on the helmet eyepiece and found that the house was still exactly the same as the day she and Pingqiong visited the house.

It hasn't been renovated yet......

She flew north outside the city of Mulan to see her own piece of land.

With the speed of her young master's black silver mecha, it was only a matter of minutes.

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

Then, he flew around his piece of land again, and did not feel anything unusual, and then flew back leisurely.

On the way back, she slowed down, wanting to enjoy more of 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, all sorts of evils are being staged.

Xia Chu met expressionlessly, dealing with three robbers, two murderers who were killing, and a man with bad intentions, because he was holding a wet handkerchief in his hand and was following a woman who was returning home from the night shift.

Just as the man was about to cover the woman's face with a wet handkerchief from behind, Xia Chujian kicked him into the air with one leg.

As for how he ended up falling and where he fell, it was none of her business.

The woman looked back in terror as if sensing something, and ran faster.

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

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

The early summer wind gently brushed her helmet.

Natsu Hatsumi flew in softly and deftly through the window.

Before he had time to take back his Shao Si Ming Black Silver Mecha, he suddenly heard Liu Shun say at the door: "Master, something is wrong with the big black dog at the door, it is already banging on the door." ”

Xia Chujian chuckled in his heart.

She took a deep breath, and did not take back her Shao Si Ming black silver mecha, directly pulled out a khaki overalls suit from the closet, put it on the outside of the Shao Si Ming black silver mecha, and then came out of the bedroom.

Liu Shun was stunned for a moment when he saw the helmet of the black and silver mecha that Xia Chu saw at the beginning of the year.

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

Xia Chu saw that she couldn't 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 really banging on the door!

No matter how soundproof the decoration of the door is, it can't shield this kind of physical movement.

Xia Chujian had a sense of foreboding in his heart.

She rushed to the living room and pulled the door open.

Yes, the door on the other side was really struck by the big black dog.

Xia Chujian immediately turned on the far-infrared night vision system function of the Shao Si Ming helmet with eyepieces.

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

When she opened it, she found that she could only see the location of the entrance behind the door.

After the entrance, the far-infrared perspective function does not work.

And inside the entrance, the picture of the big black dog desperately banging on the door behind the door appeared on the display screen of her helmet eyepiece.

Xia Chujian immediately clenched his palms into fists, knocked on the location of the door lock, and said loudly: "Open the door, you can open the door lock from here." ”

The big black dog in the house heard it, and the impact seemed to stop for a moment, and then it seemed to understand what Xia Hatsumi meant, and began to stand upright on its two hind legs, and its two front paws grabbed the position of the doorknob.

It didn't take long for the door to be opened by the big black dog!

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

But the big black dog did not hide when he saw her as before, but barked at her even more bitterly.

It seems that some unpredictable terror is coming.

Xia Hatsumi knows some animals and has an inexplicable premonition of natural disasters.

Could it be that this big black dog has a premonition of some natural disaster?

The first thing that came to mind when Xia Chujian saw was the earthquake.

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

Xia Chujian looked into the house while thinking wildly.

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

It's not right.

Xia Chujian began to walk inside, and exclaimed tentatively: "Forget your worries! Forget your worries! Mr. Yu! Mrs. Yu! Are you at home? ”

She screamed a few times before she remembered that she was still wearing a young mecha helmet, and it would be difficult to explain if she was seen by the Yu family.

But just as 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 terflurane were detected in the air."

"Take off your helmet and you'll be unconscious within three minutes."

"It is advisable not to take off the helmet."

Xia Chujian: "!! ”

There is an excess dose of Teflurane in the air?!

Xia Chujian's chemistry grades were okay, and she vaguely remembered that terflurane was a volatile gas that could cause a coma.

Since the mecha's intelligent system says that there is a very large dose, then there must be a very large dose!

What about the people of the Yu family......

Xia Hatsumi immediately stopped, and then a few lines of words appeared on the display screen of the helmet eye of the mecha.

"Thicker and thicker methane content was detected in the air!"

"Danger! Dangerous! Dangerous! ”

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

Methane?!

Xia Chujian used his knowledge of chemistry to know that this is the main ingredient of natural gas.

What's going on tonight?

Do you want to focus on chemistry?

Xia Chu muttered, and his heart was uncertain.

Because their building is an old building, there is only a very old natural gas pipeline system, which is everyone's main energy source besides electricity.

For example, when Xia Chu saw his family, Xia Yuanfang liked open flames for cooking and didn't like to use induction cookers, so their family also had natural gas.

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

Xia Chu's face changed greatly, and when she walked quickly around the entrance to the entrance of the Yu family's living room, on the helmet display, the alarm prompts became more and more dense.

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

"Ten minutes later, the tipping point will be reached."

"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 at this time, staring blankly at the situation in the living room.

Yu Wangwu sat on the sofa in the living room, facing the direction of the entrance.

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

Mr. and Mrs. Yu were lying on the ground in front of her sofa, motionless, and had long since lost their life.

And the particularly imposing nanny fell on her back near the floor-to-ceiling window, as if she wanted to escape, but she didn't seem to escape.

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

And on the eyepiece display of the Shao Si Ming mecha helmet, a countdown is being made.

"Eight minutes to go."

Xia Chu saw that his heart was shocked, so he hurriedly took a step back, no longer caring about the situation of the Yu family, waved his hand away from the big black dog, turned around with an arrow step, and returned to his home.

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

But Xia Yuanfang slept deeply, and he couldn't hear Xia Chujian's cry at all.

At the beginning of the summer, I didn't feel good.

She threw herself on Xia Yuan's bedside, tested her snort with her hand, and found that there was still a slight breath, and she was immediately relieved.

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

What else does Xia Chujian not understand at this time?

The display screen of her young master's black silver mecha has prompted that the content of terflurane in the air is not only in the Yu family!

Xia Yuanfang also passed out in a coma......

Xia Chu was anxious, and immediately made a decision, and said to Liushun, who was standing at the door of Xia Yuan's bedroom: "Liushun, immediately hold my aunt, wrap her in a blanket, pick her up, and come out with me." ”

Then he picked up Wufu, who was motionless by Xia Yuanfang's side, bent down to pick up Sixi in the puppy kennel, and then rushed back to his bedroom, dragged out his gun box from under the bed, stuffed the title deed into the gun box, and carried it on his back.

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

Liushun's mechanical arm supported Xia Yuanfang, who was wrapped in a blanket, and slid out the door behind Xia Chujian.

When he goes out, he doesn'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 the speed is particularly fast, only stopping on the first floor and the top floor, which is to give them a special elevator for the top floor.

After she came in, Xia Yuanfang, who was wrapped in a blanket with two mechanical arms of Liushun, also slipped in.

And the big black dog that kept spinning in front of the elevator door, also followed with his tail between his legs.

It didn't dare to come 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 drive it out, and then pressed the button to go to the first floor.

At this time, the countdown of the helmet eyepiece was only one minute.

The elevator sank rapidly.

But it's still not fast enough.

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

The shock wave came down from above, piercing the entire building.

The fire began to burn from the top floor, black smoke raged, and the fire burst into the sky.

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

Just when the elevator was lowered to the third floor, the deafening explosion on the top floor had already gone all the way down, like chasing souls for life, rushing straight in!

Xia Chujian listened to a series of loud rumbling noises from upstairs, and all kinds of thoughts quickly flashed in his mind, thinking about 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 that I couldn't wait for them to get to the first floor before escaping......

Xia Chujian regretted taking the elevator a little, but if he didn't take the elevator, the explosion from top to bottom would probably bury them directly in the stairwell.

Xia Chujian no longer hesitated, turned around and arched his body, put it on Liushun's cylindrical shoulders, and hugged Liushun together, as if he had set up a small tent, and caged the unconscious Xia Yuanfang, Sixi and Wufu in this small tent.

At the end of the month, the Xiaoxiang votes and monthly tickets of the treasures are all voted out!

There are also recommended tickets!

There is a new update after 05:00 in the evening.

(End of chapter)