The next day, and the last day of January.

Xiao Yu and Meng Xiaofei came here again. Yesterday, because of the episode staged by Feng Kai, the entrance of the cave disappeared for no reason, so today the two of them are going to study it carefully.

At six o'clock, a purple lightning bolt streaked across the sky, and a deep crater appeared on the ground again.

"I'm not sure if it's an alien, but I'm sure it can't be a natural phenomenon." Meng Xiaofei looked at the pit carefully. Needless to say, everyone knows that this can't be a natural phenomenon, even if lightning splits a hole in the ground, it can't be said to disappear and disappear, the mountain is not a human body, there is no such thing as automatic healing.

Xiao Yu took out an instrument from his bag, "This is what I specially asked a friend to borrow, a laser distance sensor, the principle is similar to that of a sonar that measures the depth of the sea." After saying that, she began to operate, and after a while, the distance displayed on the digital display screen was 3,000 kilometers.

"I asked a friend to investigate the topography here, and the mountain is only 517 meters high, and if the cave goes straight to the bottom of the mountain, it will be 517 meters at most. Judging by the number of measurements, the hole may have gone all the way to the ground! ”

"3,000 km? That is, to reach the outer core part of the Earth? "Meng Xiaofei has eaten a lot of related materials and is quite familiar with geological structure.

"Outer core? Can you elaborate on that? "Although Xiaoyu graduated from a prestigious university, he naturally can't compare with a person who eats books in some knowledge.

"Judging from the number of optical instruments, the hole descended vertically into the earth in a straight line, directly through the crust, asthenosphere and mantle, and reached the outer core. The temperature of the outer core ranges from about 4400 degrees to 6100 degrees, and although the outer core has the same composition as the inner core, it does not have enough pressure to make it solid, so it appears in a liquid state. If they are really aliens, then the body structure of these aliens is terrifying, and they can withstand thousands of degrees of heat without being dissolved! Of course, it could also be that they have a high-temperature resistant aircraft! But it cannot be denied that at least earthlings have not yet discovered this material. ”

"You're saying that the material of an alien aircraft can withstand thousands of degrees of heat?" Xiaoyu asked in disbelief.

"I don't know, I'm just a conjecture that defines the scene in front of me as something extraterrestrial. Matter is made up of molecules, molecules are made of atoms, and the nuclei of atoms are made up of protons and neutrons, and at such high temperatures, atoms will disintegrate! At present, there is only one possibility, and that is a nuclear fusion reaction! The closer the two nuclei are to each other, the greater the repulsive force generated by static electricity, and it is only when they are close to each other that the nuclear force (strong force) reaches a strong hand and pulls them together! But for the time being, these are all theoretical ideas of human beings, and with the current level of science and technology of human beings, they are not enough to meet the conditions for artificial fusion! If alien creatures were able to create artificial magnetic fields, they would be able to do just that! Meng Xiaofei explained.

Xiao Yu looked at Meng Xiaofei with a strange look, "Are you sure you really graduated from high school?" ”

Meng Xiaofei blushed for a while, "Uh...... Can you not mention the past? ”

"I'm sorry, I didn't mean anything else, I just wanted to say that you are very talented! It's true. ”

Meng Xiaofei didn't make a sound, and said secretly in his heart, "It's not for nothing that buddy eats so many books, but what if you are talented?" Brother looks like this, will you still promise each other? ”

Meng Xiaofei lit a cigarette while Xiaoyu continued to study around the cave.

Suddenly, Meng Xiaofei threw away the cigarette in his hand violently, rushed up and grabbed Xiaoyu's hand, "Be careful!" ”

I saw that the entrance of the cave had healed at a speed visible to the naked eye, and if Meng Xiaofei hadn't pulled her in time, maybe her hands would have been buried in the hole.

Xiao Yu looked at the scene in front of him, and was afraid at first, and broke out in a cold sweat, "It's so dangerous!" Thank you. ”

"It's nothing, it's a matter of effort." Meng Xiaofei found out that he had been holding Xiaoyu's hand, this was the first time he had grabbed a girl's hand, the other party's hand was soft and slippery, he blushed when he thought about it, but he didn't make a sound, he finally took advantage of it, and took advantage of it while the other party didn't find out, so he could catch it for a while longer.

After enjoying it for about a minute, Xiaoyu also came to his senses and looked at Meng Xiaofei, "Uh...... Can you let go? ”

"I'm sorry, I'm sorry!" Meng Xiaofei pretended to let go of Xiaoyu's hand.

"Hehe, it's okay, no need to say I'm sorry."

Meng Xiaofei was speechless, what the hell? Never mind? It doesn't matter if you said it was earlier! I'll just catch it a little longer!

After packing up their gear, the two prepared to go home. Because of the embarrassment just now, Meng Xiaofei didn't dare to speak. He was afraid that the other party would find out that he did it on purpose...... This is the perfect interpretation of being a thief.

When the car drove to the entrance of Meng Xiaofei's community, it was close to eight o'clock, and the dim street lamps glowed with yellow light, which complemented the reluctance in Meng Xiaofei's heart. After being with Xiaoyu for a long time these days, Meng Xiaofei was suddenly very reluctant to leave, could it be that this is love? No, could this be a crush?

Just as Meng Xiaofei turned around in frustration and was about to leave, Xiaoyu suddenly spoke, "It's better for me to invite you to dinner, I delayed you for a day, and I haven't eaten yet." ”

"Isn't it okay? Breaking the bank again? Meng Xiaofei was pushing, but in fact, his heart was already happy.

"It should be! And just now, you saved me once, and it's also a thank you for inviting you to a meal. ”

"Then come to our neighborhood, there is a restaurant in front of it that tastes very good."

"Okay!" Xiaoyu parked the car, got out of the car and walked to the side with Meng Xiaofei.

Didn't go far, Meng Xiaofei only felt that he was tripped over something under his feet, and almost fell, and when he looked down, it was a small basketball, and in the direction where the basketball was rolling, there was a cute little girl looking at him with a smile, the little girl was about two or three years old, with a round face and big eyes, very cute, Meng Xiaofei saw that it was a little girl who was naughty and mischievous, so she naturally couldn't lose her temper, so she responded with a smile.

The little girl ran towards her basketball, and at the same time, a van sped by, and when she saw a figure suddenly coming out, the driver couldn't dodge, so she could only subconsciously honk the horn! But it was okay that he didn't honk the horn, and when he honked the horn, the little girl was frightened and stood still and didn't dare to move.

Meng Xiaofei frowned, didn't think about it, rushed directly and hugged the little girl......

Bang~~~!

After a loud bang, Meng Xiaofei was knocked several meters away, Xiaoyu was already frightened when she saw this, this qiē happened so fast that she didn't even have time to react.

The driver got out of the car, rushed forward quickly, and looked at the scene of the accident in pain.

"Dumbo!" Xiao Yu came to his senses and rushed up, and there were many onlookers around.

"Lan Lan!" At this time, a young woman also rushed out, she didn't keep an eye on her daughter for a few minutes, and unexpectedly there was a car accident, and her face was already white with fright.

"Mom!" The little girl broke free from Meng Xiaofei's arms, and her mother was much relieved to see that her daughter was fine, but then another sad feeling came up again, and the kind person who saved her daughter was already lying motionless on the ground.

"Please, any of you who can help save people! Please! Xiaoyu couldn't help crying when she saw Meng Xiaofei lying in a pool of blood.

The driver had already called the police, and the well-meaning people around had also called for an ambulance. An enthusiastic doctor from the clinic on the side hurriedly walked up, touched Meng Xiaofei's pulse, and probed Meng Xiaofei's nose with his hand, no longer breathing, and then said regretfully to Xiaoyu on the side, "Please mourn ......"

Xiaoyu suddenly felt that her body was weak and collapsed to the ground, she didn't dare to accept this fact at all, not long ago, Meng Xiaofei saved herself, it was only less than two hours, how could Meng Xiaofei ......

"Alas, Heaven is unfair! Why don't such well-wishers live long? ”

"Yes! There are not many people who are willing to sacrifice themselves to save others! God is blind! ”

"I told you how you drive!"

"That's it! The neighborhood is also driving so fast! ”

"That's right! One is a child! One is one of the few well-wishers! Your conscience will be condemned for the rest of your life! ”

The crowd was talking, and Xiaoyu didn't seem to be able to hear it now......