The Nanjing Yangtze River Tunnel is a river-burning tunnel located between the Nanjing Yangtze River Bridge and the Nanjing Third Yangtze River Bridge. It is also an important transportation road connecting Jianye District and Pukou District. Before the great destruction, it once became the first level of construction of the Huaxia Tunnel.

However, after more than a thousand years, the entrance of the tunnel has been deeply buried by various ruins, and a thick layer of river sand is covered with it, so that Gu Han and Misaka Mikoto were standing directly above the entrance of the tunnel, but there was no trace of the tunnel at that time.

"Just below, my sword energy has discovered a huge space under the soil layer!" In order to find the accurate population of the tunnel, Gu Han shot his sword energy into the ground, and finally found that there was a huge space below at a certain location, which should be the entrance to the tunnel.

So, the precious sword girl turned into hoes and shovels at this time, digging a very deep hole in the ground. Looking down from this hole, it was empty and dark inside, and I didn’t know what the situation was like in the tunnel.

"Bring this!" Gu Han took out two small nose congestions from his dimensional pocket and handed them to Misaka Mikoto, and then stuffed two into his nose himself.

"What is this? Is there water in it?" Misaka Mikoto was stunned when she saw these two small noses. She didn't understand what Gu Han gave her this thing.

"This is not a waterproof nasal congestion that plugs your nose, but a high oxygen breathing plug that allows us to breathe pure air," Gu Han explained. "Don't look at these two things being small, stuffing them into the nose not only purifies the toxins in the air, but also releases oxygen, allowing us sword holders to survive in poisonous gas or anaerobic environment for a full 24 hours."

"So that's it! I didn't expect that your human science has developed to this level, unlike our free city, which has been almost six hundred years, but technology has not made any progress!" Misaka Mikoto exclaimed and stuffed the nose into her nose. The wings on both sides were stretched open, looking like a pig's nose.

"Be ready, we're going down!" Gu Han said lightly, then he was the first to jump from the hole. Mikoto Misaka smiled bitterly, but he still followed Gu Han and jumped down.

"Chairman Ju, if you have communication, I hope you can contact you. It is a communication from the First Defense Front Command." Ju Wudao, who was patrolling guards and shelter equipment in Yuzhang City, received a report from the secretary.

"First Defensive Front Command? What are they looking for me? Did Yuan Ji start attacking!" A ominous premonition surged in Ju Wudao's heart, and he immediately said, "Come in, pick it up now!"

"Yes!" The secretary pressed on the personal terminal, and Ju Wudao's personal terminal rang, and Ju Wudao immediately connected. "Hey, I am the chairman of the Sword Committee, Gu Wudao. What's the matter with your command center? Did Yuan Ke attack?"

"Report to the Chairman, there is no movement in Yuanmu, and the First Defensive Front is still safe!" said the person in charge at the other end of the communication.

"What's the matter with me?" Gu Wudao frowned. What was the commander of the first line of defense doing?

"Reporting to the Chairman, the four sword-holders who came back from outside the city just now said that they must see you, and said that they are your apprentices and sons. We cannot confirm, so we can only come to find you!" The person in charge said with suspicion. Obviously, he probably didn't believe that these four people would be Ju Wudao's apprentices and sons. They were just as sure as the other party was, so the person in charge had to report to Ju Wudao in person!

"Backed from outside the city! Could it be that little brat Lu Ren is back?" Gu Wudao was delighted when he heard the news, but he soon recovered and came to be serious and said sternly, "You ask them to wait for me in the headquarters, and I will go there now."

"yes!"

"The oxygen content is 5%, chlorine gas 3%, nitrogen gas 60%, carbon dioxide 20%, and other harmful gases 10%, and the chance of death is high. You cannot breathe directly." This is the answer told by the air detector to Gu Han. The air in this tunnel that has been closed for unknown years is no longer something that humans can survive. If this hyperoxia breathing is not plugged in, Gu Han will probably be poisoned to death before passing through the tunnel... The close-fitting shield has no ability to resist toxins. Many sword holders do not die in Yuan Li's hands, but have died of poisoning for various reasons. Therefore, hyperoxia breathing plugs and various toxin detection equipment have become essential items for sword holders. This is also the reason why Gu Han carries these things with him in his dimensional pocket.

"How is it, how do you feel? Can the environment inside the tunnel be adapted?" Gu Han asked Misaka Mikoto beside him. Misaka Mikoto nodded, indicating that he could adapt.

"Then keep going to the money!" Gu Han took out the flashlight. This dark tunnel that had never seen light for hundreds of years had traces of light again. Unfortunately, the light of a flashlight was still too dim and could only shine clearly on a small area around Gu Han. It was impossible to illuminate the entire tunnel.

Hundreds of years have passed, and the original road surface of the tunnel is not clear, and replaced by a layer of floating soil about the thick of a finger... These floating soils are formed by the accumulation of dust over the past few hundred years, and look like thin snow in winter.

"It seems that when it was destroyed, there was a catastrophe in this tunnel!" After walking a few hundred meters ahead, Gu Han saw that more than ten cars were abandoned on the road. Some of the doors were still open. Obviously, the owner escaped in a hurry, and even the doors had no time to close. Gu Han saw through the door that there was a doll covered by dust in the car with only metal skeletons... It was a doll of a cute animal anthropomorphic sheep. Gu Han saw it in the archaeological channel. This was the most famous animation before the collapse. It is said that people at that time liked this animation very much. It was the pride of Chinese animation and was deeply loved by the audience of B station (readers who don’t understand B station can go to B station to check it out, a very interesting website.). There is a saying: "My childhood was Xi Yangyang and B station wolves, which is great!!"

There are other vehicles that are not as lucky as the owner of this car. They did not open the car door. The pale bones sat in their position, but the skull disappeared. I don’t know where they went. Gu Han took a look and found that there were four white bones in the whole car, all of which were lost. Looking at the smooth knife marks of the broken part, Gu Han was sure that their heads were separated by extremely sharp blades. In other words, they died in Yuan Pu’s hands, otherwise they would not have had time to escape from the car.

What made Gu Han feel the most regretful was the small white bone in the back seat of the car. It seemed that she might have been a little girl of seven or eight years old during her lifetime, because she was wearing a broken flower skirt and lace. Obviously, the owner of this corpse should be a beauty-loving girl.

Seeing this scene, Gu Han suddenly felt infinite heartache in his heart. It was sad and lamentable. If Yuan Gong had not appeared, the child would definitely be able to grow up, enjoy perfect love, have children, and spend his whole life happily, rather than using his bones to tell Gu Han about her tragic experiences a thousand years later.

"Should we bury them?" Mikoto Misaka was like Gu Han, feeling sad about this tragic situation. This is the difference between the freed one and the Yuan-Kao. The freed one regards human beings as their kind, and in the eyes of the Yuan-Kao, human beings are completely aliens, even if the Yuan-Kao was human in their original world.

"This..." Gu Han hesitated for a while. It was not impossible to bury it, but there were so many corpses in the tunnel. If they were all buried, it would probably not be enough for a few days. So rationally speaking, Gu Han didn't want to do this.

But when Gu Han saw the broken lace white skirt, he softened his heart. Since he met her, he would give her a home she should have!

"Okay!" Gu Han nodded, "But only once, we really don't have time to waste here!"

"I understand, I haven't been so soft-hearted for a long time!" Misaka Mikoto nodded. She has also encountered countless storms and people who are used to death, and she rarely feels soft-hearted because of human bones.

This is also because the Nanjing Changjian Tunnel was closed, and almost neither human nor Yuangu had entered here again, so so many intact corpses were accumulated here. In the outside, the bones of those humans who died in the era of great destruction had long been blown into gravel by time and wind, and turned into calcium elements in the soil.

Gu Han gently pulled the door on the car door, and the locked door was easily pulled open. Gu Han gently lifted the little girl's bones and squared her to a piece of ground that was cleared out of the edge of the tunnel. There was floating soil beside her. As long as the floating soil was covered, the little girl could be buried in the soil.

"Wait, this is..." Gu Han suddenly discovered that the pelvis of the corpse was actually in the shape of a funnel with a large upper and a small lower lower... Gu Han's face turned pale and he randomly filled the soil and took Mikoto Misaka away from here... It was really unlucky. Could it be that the sage-sangxin would encounter such nonsense?

As Gu Han and Misaka Mikoto continued to deepen, more and more cars and bones appeared in this tunnel, which were much worse than the family just now. Misaka Mikoto was also very obedient and did not make a request to bury them.

After struggling to advance about three kilometers, we reached the middle of the tunnel, and the road ahead was blocked... Two buses overturned on the ground, completely blocking the road that was not wide. If we want to pass here, we must turn over from the bus.

This is not a difficult task, but when Gu Han saw one of the buses, he suddenly felt a palpitations, as if something terrifying was hidden in the buses.
Chapter completed!