Yin Yuting said that there was a batch of explosives under the city, which aroused the curiosity of the other three. However, it was Long Xingyi, a student of "100,000 Whys for Primary School Students", who initiated the question.

"Below? Didn't you say it's all smog down there? Long Xingyi asked.

"That's right, due to increasing pollution and rising sea levels, humans have been living in cities that have been floating above the ground since the 22nd century." Yin Yuting said this, Yin Zhendong looked at her in confusion, and then looked at Long Xingyi. How can my niece tell history to a person in her twenties? He didn't know that history in his eyes looked like "future" in Long Xingyi's eyes.

Yin Yuting continued: "Most people live in above-ground cities, or interstellar immigrants go to the moon. But there are also a very small number of people who are still hiding under this haze and living their own lives. ”

"Sick? Good people don't live in the city, they live in chimneys. Is it a slum? Long Xingyi pointed to the strange beast in front of the chariot, motioned for Fang Qitian to reverse the car, and then asked.

"It's a so-called 'flea market', right?" Yin Zhendong also guessed.

"Flea markets are one thing, mostly the black market. Under this city, there are ruffians, hooligans, three religions and nine streams, mixed fish and dragons, and there are many people with ulterior motives, who want to buy some contraband, so they secretly trade in this haze. I've been a police officer all these years, and I've dealt with them a few times. Yin Yuting said.

"Then what are they doing with explosives?" Fang Qitian set the chariot back a while, set up automatic aiming, and used the laser cannon to suppress the enemy in front of him with a round of firepower.

"A few years ago, all the minerals near us were mined, but a large number of ...... were inexplicably lost from the explosives used in mining," Yin Yuting recalled.

As soon as she said this, Yin Zhendong quickly interrupted her, "What? In such a serious accident as the loss of explosives, don't you police solve the case quickly? ”

Yin Yuting paused for a moment, and then continued: "That batch of explosives, after we traced it, should have been hoarded by a merchant in this underground black market. In our country, there are no terrorists and triads, so presumably his explosives can't find a home, and he is not very happy. ”

"Then let's let him be a favor and give it to us!" Long Xingyi answered.

Yin Yuting nodded knowingly and said, "I've dealt with them, so I'll go!" You're in charge of planting explosives on the ground, and I'm going to convince the black marketeer. ”

"I'll go with you! Be safe. Long Xingyi said.

Yin Zhendong also agreed: "That's right, let this kid accompany you!" Fang Qitian and I will set up explosives on several main roads on the ground, and leave the rest to you. Success or failure...... It's two o'clock in the morning, and before half past four in the morning, be sure to gather at the south gate and retreat together! ”

So the four of them were divided into two groups, Yin Zhendong and Fang Qitian took the two commanders of the other troops back to their respective ammunition depots to get explosives, while Yin Yuting took Long Xingyi through the streets and alleys to find the entrance to the black market.

Yin Yuting and Long Xingyi only carried two laser pistols, passed through the traffic stagnant on the street, turned left and right all the way, and finally arrived at the entrance of a shopping mall.

"Can you go down here?" Long Xingyi asked hesitantly.

Yin Yuting confidently continued to walk forward, saying as she walked, "Well, there is an underground entrance here. With that, he opened his palm forward and said, "Illumination." The tip of the palm on the armor automatically emitted a bright light.

"Hey, that's interesting!" Long Xingyi also observed his palm in novelty and said, "Lighting." "But I was almost blinded by the strong beam.

The mall was pitch black, and only the light source in the hands of the two people could illuminate it. Yin Yuting walked to the elevator door in a narrow corridor and said, "This is it." ”

Long Xingyi looked at the elevator in front of him blankly, and said to Yin Yuting, "Have you forgotten?" Now there is a power outage in the city. ”

Yin Yuting pressed the button next to the elevator and said, "Yes! Fortunately, this is a special elevator for pipeline maintenance, and there is a backup power supply in case of a power outage. With a weird smile, the elevator door opened.

The two entered the elevator, and Yin Yuting said to the control panel: "Go to the bottom layer." The door slowly closed, and the elevator began to descend rapidly.

The two of them were silent in the elevator for a few seconds, listening to the sound of artillery fire on the ground gradually fade away and weaken. Long Xingyi seemed to suddenly remember something again, and said, "I don't understand. ”

"What don't you understand?" Yin Yuting turned her face to look at him.

"Since our city is so high in the sky, how did the alien fighting beast climb up?" Long Xingyi asked bluntly.

"Our city, with a mountain to the north, may have climbed from the mountain! And there are several passages at the entrance to each city that lead to the ground, from where they can also climb up. ”

"But if there are people under the city, the same human flesh, is the human flesh on the mountain better than the human flesh under the mountain?" Long Xingyi kept asking.

Yin Yuting also suddenly turned her head, stared at him for two seconds, and calmly replied, "This question...... I don't know anymore, so it's better to ...... You go ask the alien fighting beast? ”

It didn't take long for the elevator to finally start slowing down.

"Put on your face covering." As she spoke, Yin Yuting buckled the mask on her helmet. Long Xingyi tentatively touched it, and also pulled down the mask on his helmet.

The elevator doors opened, and the outside was like a smoking room that had just experienced hundreds of people smoking together, smoky and the air was cloudy. Occasionally, a few faint figures can be seen in the smoke ahead.

"Oh my God, there are still people living in this place." Long Xingyi followed Yin Yuting out of the elevator and looked around.

The ruins of 21st-century buildings loom in the thick haze, and the "fast lane" paint signs are still faintly visible on the cracked asphalt roads. Long Xingyi could only rely on the display on the LCD screen inside the mask to identify one or two pedestrians walking in the distance.

The pedestrians who walked past them were almost all dressed in rags, wearing thick masks or scarves covering their mouths and noses. In the huge goggles, I couldn't see their eyes, but I could see that passers-by were paying attention to these two outsiders wearing mechas. But everyone was in a hurry, and seemed unwilling to linger in the smoke for a second longer.

Some lights could be vaguely seen in the distance, but the haze was too heavy for Long Xingyi to see where the light source was. Looking at the "haze city" in front of him, Long Xingyi was full of emotion. The "return" of human beings to Mother Nature is really poignant, and in the end, it also harms itself.

"That's it, hurry up." Yin Yuting pointed to the bright light in front of her and said to Long Xingyi.

The two of them still had a task to do, so they hurried to the direction Yin Yuting pointed out, and under the curious gaze of others, they walked along the dilapidated road to the piece of light.

Walking closer, Long Xingyi gradually saw that this was like a market in their era, and the lights he saw just now were actually light signs on both sides of the road. Without the constraints of the chengguan, the streets on both sides look chaotic. Fortunately, there were no cars, so pedestrians walked in the middle of the road, sometimes burrowing into a shop on the side of the road.

"It should be around here," Yin Yuting said, as if she was looking for something, groping along the side of the street.

Finally, she stopped in front of a shop engraved with a five-pointed star. "That's it." As she spoke, she knocked on the wooden door, and a thick layer of dust fell.

In such a broken place, can you still hide explosives? Long Xingyi thought and shook his head secretly.

Not long after, a crack opened in the heavy wooden door, and a person who couldn't see his face clearly, wearing a thick scarf, poked his head out of the door, looked at Yin Yuting, and then at Long Xingyi behind him.

"I'm looking for 24K, please let me know." Yin Yuting said to the janitor.

With a "Peng", the door slammed shut again.

"Maybe it's to hide his private cobra wine!" Yin Yuting turned back to Long Xingyi and said.

"I know." Long Xingyi smirked and said, "In the past, the gangster joints in the movies were like this! ”

Yin Yuting shook her head, "He's not a gangster, he's just a businessman, but the things he sells can't see the light." ”

As soon as the words fell, the dilapidated door behind her opened again, and the janitor just now turned sideways to let Yin Yuting and Long Xingyi in.

The two entered the store, and the masked man closed the door from behind them, removing his scarf and hood. Only then did Long Xingyi realize that the other party was a gray-haired old man. The old man said to them, "Come with me!" ”

Yin Yuting also lifted her mask and said to Long Xingyi: "There are air cleaners in the room, you can take them off." ”

Long Xingyi also took off his mask, and finally felt the cold wind of the 21st century air conditioner again. He took a deep breath, "What it feels like home!" Long Xingyi sighed, and then followed the old man forward.

The trio walked past the front desk and through a long hallway that looked like a former inn that was now being repurposed by this so-called "24K" waste.

The hallway was spotless and looked like it was cleaned frequently. There are oil paintings of various modern art hanging on the walls, which look antique.

"These are fakes, aren't they?" Long Xingyi pointed to a pair of Van Gogh's "Starry Sky" and asked in a low voice.

"Maybe what's in the modern British museum is a fake." Yin Yuting smiled and said, and continued to walk forward without looking back.

Walking to the end of the corridor, the old man knocked on the door, and without waiting for the people inside to answer, he unscrewed the handle and let the two in.

In one suite, the layout has been changed to look like an office. A burly man sits behind a desk, lighting a cigar and snorting through the clouds.

"The air quality is like this, and it's still smoking. Just go out and take two puffs of haze. Long Xingyi said with a little disgust.

"Hey, hey, hey." The man grinned, leaking out a mouth full of black teeth, "Miss Tang, this pretty boy is your new partner?" Good eye! ”

Yin Yuting fanned the smoke with her hand and walked to the desk, "You are quite leisurely." ”

"Hehe, you're pretty busy up there today, aren't you? You're fighting so hard, but it's nothing like us! The 24K teased with ease.

"Don't say it's nothing wrong with you, didn't I just come to you?" Yin Yuting said.

"What's there to do? I would like to hear about it. 24K said. Long Xingyi even wondered if he would die if he didn't laugh so disgustingly when he spoke.

"I want to use the batch of explosives used in the previous mining," Yin Yuting said casually.

24K raised his eyebrows, and finally put away his disgusting smile, "Miss Tang, your above affairs have nothing to do with me!" Besides, which batch of explosives? How did I not know? ”

"Who said it has nothing to do with you? When the beasts above completely invade the city, you will see if they will come down! Long Xingyi finally couldn't help but say.

24K turned his gaze to Long Xingyi and asked, "This pretty boy, what is your name?" ”

"Long Xingyi."

"Long Xingzai, when the beasts above take over the entire city, I can also move to another city to continue my business. You don't know, do you? You have planes there, we have trains here. 24K said triumphantly, spitting out another smoke ring.

Train...... How could I not know? Long Xingyi thought and continued, "Really? Then you must move as soon as possible! I see that you still have a lot of belongings, and when the time comes, the alien beasts will attack it together, but I'm afraid you won't have time to move! ”

"This beast attack is fierce, and the outbreak is global, many cities have been attacked, where can you escape? Why don't you evacuate south with us from underground, with ground troops covering, and you might be a little safer. "Yin Yuting analyzed the pros and cons for 24K, and she knew that the businessman in front of her only talked about the pros and cons." Moreover, who is that batch of explosives, I'm afraid we know it, and we don't need to pretend it, and I'm not here to seize you, what are you hiding? ”

Hearing this, 24K pressed the cigarette butt of the cigar into the ashtray and twisted it a few times, "I lost contact with several intelligence points today, it seems that the matter is indeed a bit serious......" He glanced at Yin Yuting and Long Xingyi with suspicious eyes, and finally leaned back in the chair as if he had made a decision: "Say it!" What price do you offer? ”

Quote? We didn't seem to bring any money with us. Long Xingyi looked at Yin Yuting and thought in surprise.

"This matter is beneficial to you and me, and after the war, I don't know what the price will be, is it necessary to negotiate the price at this time?" Yin Yuting asked.

The disgusting smile that appeared on 24K's face just now reappeared, "Hehe, Miss Tang, I'm a businessman, not a philanthropist." I'm going to do business, and business has to negotiate the price. ”

"There should be no one in the bank above now, you can go up and take it as you like." Long Xingyi said contemptuously.

"Long Xingzai, don't be in a hurry!" 24K waved his hand and said, "Miss Tang is right, let's not talk about money now, you have what I want now." ”

"What do you want?" Yin Yuting asked.

"It's simple, I want this mecha on you." 24K said with a smile.

Yin Yuting suddenly became nervous, "No, these technologies are military secrets, I can't leak them casually!" ”

"Yes! That's why this thing is valuable, to put it bluntly, I have been hoarding explosives for a long time and haven't left my house, but since Miss Tang wants it, then it will appreciate in value! Moreover, if it is an ordinary soldier's mecha, we can also imitate it. Miss Tang is the niece of Captain Yin Zhendong, I'm afraid that what Captain Yin equipped Miss Tang with is high-tech officer armor, right? It's worth it! ”

"No, the technology of high-level mecha must not be transmitted to the black market!" Yin Yuting said resolutely.

"That'...... I can't do anything, the door is over there, the two of you go slowly! I'm also ready to pack up and move. 24K rubbed his hands together and said to Yin Yuting with a disgusting smile.

It turns out that the "Iron Man" armor is still a military secret, so valuable! Long Xingyi looked at Yin Yuting. I saw Yin Yuting's expression solemn, standing in place and thinking about it for a while, and finally made up her mind and said, "Okay!" I'll give you my mech, but you have to promise me that you won't resell it for a year, and that you will have to plant all the explosives on the city foundations within half an hour until I detonate them myself. ”

"It's a deal! When we do business, we pay attention to credibility! Miss Tang give me your mecha, and I'll do it right away! 24K said with a smile on his face.

Yin Yuting hesitated for a moment, but still restored her mecha and turned it into two bracelet-like iron rings and placed them in front of 24. Finally, he added: "Remember, within a year, you are not allowed to change hands, and you are not allowed to study the technology in it." ”

"Hey, hey, hey, it's easy to say, it's easy to say!" 24K seemed to be afraid that Yin Yuting would regret it, so he put the bracelet in the drawer. Then he took out a mobile phone from the drawer and dialed the number.

"I'll go! Cell phone? "Long Xingyi has not seen a mobile phone of his era for a long time since he came to 2199, and his own one was also shattered when he fell off the cliff, and at this time he saw a mobile phone that looked like an iPhone, which was very fresh.

24K nodded knowingly, "The old way, it's more effective." Feed? With that, he began to deploy according to Yin Yuting's intentions.

After hanging up the phone and waiting for less than 10 minutes, there was a knock on the door again, and the old man did not wait for the people in the house to answer, so he pushed the door and entered, and put something shaped like a remote control on the desk.

"Miss Tang, everything is arranged, the remote control is here." 24K pointed to the remote control and said, then took out a mask from the drawer, "This mask is given to you for free." 24K showed another row of black teeth, hehehe, and smiled.

"Okay, it's half past three, I'll detonate the explosives at five o'clock in the morning, you guys evacuate as soon as possible!" After Yin Yuting finished speaking, she picked up the remote control and mask from the table, and walked out of the room with Long Xingyi.

As soon as he walked out of the door, Long Xingyi opened the chatterbox: "Lie down!" You just gave him the armor? Military secrets! Why did it leak like this? This way doesn't work, let's think of another way! ”

Yin Yuting didn't say a word, and walked forward with Long Xingyi. When she was about to walk to the elevator, she seemed to be impatient with Long Xingyi's complaints, and said: "That's right, the officer mecha is different from that of ordinary soldiers, and there is a lot of technology. ”

"Then you give it back to him!" Long Xingyi was so angry that he jumped up and down like a monkey, in fact, he didn't know why he was more excited than this professional policeman.

"I didn't give it to him! When I was at the gate of the hospital just now, I gave you my officer mecha because you have more potential, so the one on your body is the officer mecha, and mine is just an ordinary soldier's. ”

Long Xingyi was stunned for a second, "Then what you gave him was ...... Is it fake? Lie down, you're bold enough! What if he finds out? ”

Yin Yuting gave him a blank look from the mask, "This is not, that is not either." That's why I bluffed him not to study technology! Less nonsense! Go for the top! I don't know what's going on with that now......"

"The ground has basically been occupied by alien fighting beasts, if you want to go up to the ground, it is recommended to take the underground elevator on South 20th Street." Anna prompted.

After listening to Anna's report, Long Xingyi didn't forget the topic just now, and said a little unexpectedly: "Lie down, your acting skills are good!" I'm worried about your tangled look......" said the two of them, and together they walked through the streets and alleys, towards the elevator that Anna was pointing to, and towards the ground.

When we reached the ground, it was exactly four o'clock in the morning. Yin Yuting looked at the ruins behind her, sighed, and said to Long Xingyi, "Call my uncle with your mecha, let's go meet them." Namdaemun is not far from here, let's go! ”

Sure enough, the two of them didn't walk long to the south before they saw Yin Zhendong's chariot coming towards them from a distance.

Yin Yuting reported her previous experience to Yin Zhendong, Yin Zhendong nodded and said: "It's almost time now, let's drive the car out of the city gate, and when the time comes, it will be detonated!" ”

At five o'clock, as Yin Yuting and Yin Zhendong pressed the remote control, bursts of explosions burst out, and in the city where there were no living people, the alien fighting beasts that were gradually approaching in the distance were frightened by the sudden explosion, but it was too late, in an instant, the sky collapsed, and the entire city collapsed downward, and the alien fighting beasts were either stoned to death by high-rise buildings, or fell into the abyss along with the rocks and steel bars.

Yin Zhendong's chariot, in the billowing smoke of this explosion, headed south.