Xia Yu picked up the injured Zhang Xiaofei, carried him to his cave, and took some healing medicine for Zhang Xiaofei to take. The next morning, I saw that Zhang Xiaofei finally opened his eyes, and his face was also a little bloody.

"Who are you, and why did you save me!" Zhang Xiaofei was the first to ask.

"I need a reason to save you? It's not appropriate for you to question the life-saving benefactor like this," Xia Yu said with a smile.

"I'm sorry, thank you for saving your life!" Zhang Xiaofei replied with some embarrassment.

"You're from the underworld?" Xia Yu asked directly.

"What do you mean? Who are you? Zhang Xiaofei instantly returned to his cold expression.

"Don't be nervous, I'm just looking for my relatives, and I suspect that if she lives, she may have gone to the underworld, so that's why I have this problem." Xia Yu hurriedly comforted.

"Who are you looking for?" Zhang Xiaofei asked cautiously.

"My sister. His name is Xia Yu, fourteen years old, and he was lost from the migration of the Demon Capital! Here are the photos! Xia Yu said and took out a photo of his sister from his arms.

Zhang Xiaofei glanced at the photo, and looked at the young man in front of him, his brows were tightly locked, as if he was worried.

"Have you seen her? Is he still alive and is she really in the underworld? Xia Yu asked a little eagerly.

"Who are you and what is your name?" Zhang Xiaofei asked tentatively.

"I am Xia Yu's brother, also called Xia Yu, with different words of the same name!" Xia Yu's voice also trembled a little.

"And what are the names of your parents?" Zhang Xiaofei asked again.

"My father was in the summer, and my mother's name was Mullan. Little brother, tell me if my sister is still alive. Xia Yu's tears had lost his eyes, and his voice had lost his tone.

"That's right, Sister Xia Yu is still alive."

The sentence that he was still alive made Xia Yu cry with joy. Originally, I was ready to find my sister, and I thought about how to comfort my parents, after all, my sister disappeared in the wild in the cataclysm era, and the probability of surviving was zero. Now that he learned that his sister was still alive, Xia Yu couldn't cry, and it took a long time to calm down.

"Little brother, can you take me to my sister?" Xia Yu asked.

"Although you say the same thing as Sister Xia Yu, I still can't judge your true identity, if you are a spy sent by Linjiang City, we will lose a lot!" Zhang Xiaofei said in embarrassment.

"Then you can go back and ask my sister and you will know, and I can wait here." Xia Yu proposed.

"Okay, do you have any tokens or secrets? Determine your identity! Zhang Xiaofei also thinks that this method is more secure.

Where is there any token, and you have to ask your sister to confirm your identity, Xia Yu thought about it and said to Zhang Xiaofei.

"You tell my sister that I didn't mean to break that red doll!"

"Okay, then you can wait here, it may take two days." After Zhang Xiaofei finished speaking, he got up and went down the mountain and disappeared into the mountain forest.

Xia Yu looked at the back of the leaving, and was so excited that he didn't know what to do, so he resisted the intention of following him and practiced his knife technique on a rock. I didn't go back to rest until I was sweating profusely and my strength was exhausted.

On the third day, when Zhang Xiaofei returned to Xia Yu, he was already smiling, like a younger brother next door, shouting Brother Yu, Brother Yu. led Xia Yu over the mountain and plunged into a stone forest full of strange stones.

"This was originally a scenic stone forest, but there is a cave below, which leads directly to our base." Zhang Xiaofei explained while leading the way.

"It took us a lot of effort to snatch this underground base from the beasts, and then we improved it to get to where we are today."

From an entrance under the stone forest, I entered the underground cave, and suddenly a rich aura came to my face. The rock chalcedony underground, infected by the aura, has turned into an energy crystal that can extract energy. Moreover, the cultivation environment is also unique, and the shimmering shadow is actually a blessed place for cultivation.

"The resources of each underground world are different, and even Jiang Cheng is trying to occupy our energy crystal stones, we have talked about it before, and then there was a battle due to disagreement, and then the conflict has been until today." Zhao Xiaofei introduced.

After a long day of walking through the labyrinthine cave, in a hidden place, the rock was removed, and a gate made of metal stood in front of me. The metal glowed, and the entire gate blended with the mountain stone, and it was unusually strong.

"We have a lot of materials here, and there are many metals that have undergone mutations after the cataclysm, don't look at this door is not big, even if your dragon-level battle is coming, you won't be able to break it for a while." Zhang Xiaofei pointed to the two-person high gate and said proudly.

Then there was a banging on several protrusions of the gate, and someone inside opened the door. An underground space with no end in sight is presented.

This underground world is empty and high, and some buildings are built in this underground space. Although there is no sun, moon and stars shining, there are bright lights to accompany it. With the sound of some machines, some heavy industrial equipment is working, mining, metallurgy, very busy.

Moving forward again, through the underground town, we came to an upward passage. When it reappeared, it was already in a canyon basin surrounded by mountains, and the basin was covered with clouds and mist, and although the sun and moon were not visible, it was much brighter.

A few but beautiful buildings stand in the basin, and many more are planted with grain and other plants. Even in the Linjiang City base, naturally produced products are very scarce, and captivity and synthesis are the main sources of food for people.

When I came to this mountain basin, there was immediately a girl in white running to this side, and when Xia Yu saw it, it was his sister who had been lost for two years, Xia Yu. It's just that the running posture is very stiff at this time.

"Little sister, it's really you, that's great!"

"Brother, I thought I would never see you again in my life!"

Brother and sister hugged each other, and my sister couldn't cry. Xia Yu felt a metallic chill coming from one of his sister's arms, so he took a closer look, but saw that his left hand turned out to be a metal prosthetic.

"Sister, your hand?"

"It's okay, brother, and one leg is also useless, it's good to be able to pick up a life." Although Xia Yu has lost his hands and feet, he is open-minded.

"How are your parents, tell me about it." My sister urged anxiously.

"Can I make a phone call here?" Xia Yu turned back to Zhang Xiaofei and asked.

"Brother Yu, there is a shielded signal here, and satellite calls are not allowed, and even if they are not shielded, calls will be prohibited, which will attract those people from the base."

"I know, but I have a picture of my parents here, show you!" Xia Yu took out some photos and showed them to his sister.

The two looked at the photo while chatting, it turned out that Xia Yu was separated from his parents that day, and he accidentally encountered a fierce beast, Xia Yu, who thought he was going to die, was rescued by Leader Zhang, and then took care of her and gave her some light work to take care of crops, and has survived to this day.

After a while, a big man walked in the distance, with an iron body and dark skin. Walked towards the position of a few people.

"Brother Yu, let me introduce you, this is the leader of our base and my father." Zhang Xiaofei introduced,

"Oh, Xia Yu meets Leader Zhang." Xia Yu hurriedly got up and luggage.

"Hey, what's polite, just call me Uncle Zhang. I heard Xiaoyu say that your brother, who can escape back from the Northeast, is not small! Leader Zhang looked at Xia Yu and smiled.

"My sister has always been taken care of by you, and I would like to thank you again on behalf of my parents." Xia Yu thanked.

"It's also Xiaoyu, this girl, has a big life, when we found it, her hands and feet were bitten off by fierce beasts, and it took a lot of effort to come back to life. I had to put a prosthetic leg on the other hand. You talk, let's talk about it in the evening! Chief Zhang didn't bother Xia Yu and the others, and left by himself.

Chief Zhang's attitude made Xia Yu very comfortable, not pretentious, nor condescending, more like a parent, not as depressed and vigilant as in Linjiang City.

In the evening, Xia Yu's brothers and sisters came to Zhang Xiaofei's house as guests, with food, wine, vegetables, and meat.

"Let me introduce you to you, this is my friend and one of the leaders, Jiang Chong. Just call him Jiang Lao! Leader Zhang introduced a white-haired old man.

"Hello Jiang, I'm Xia Yu's brother." Xia Yu greeted politely.

"I heard Xiao Fei talk about you, if you have reached the S-level battle general at such an age, if you have cultivated a full set of exercises, you will already become a god of war at this time!"

"Elder Jiang, what do you mean by a full set of exercises?" Xia Yu was puzzled.

"Eat first, talk about those things later." Jiang Zhong said with a smile.

Several people were also happy as guests and hosts, although the food was a little rougher and the wine was a little rougher, but all this was so real and comfortable in Xia Yu's eyes.

After the meal, Leader Zhang carefully took out a little tea, and several people sat around the table, making tea and chatting.

Xia Yu looked at the two leaders who had no nobility, and couldn't help but sigh in his heart, complaining about the various systems in Linjiang City, the arrogance of the warriors, the protection of the base, the arrogance of Chen Bufan, and the hardships of the people. From time to time, he was angry, slapping the table and scolding.

"Xia Yu, you are right, we will also send someone to Linjiang City as a warrior to buy supplies and inquire about the news. The current Linjiang City has basically been controlled by the Chen family, and the martial arts association has been set up in the air. A miasma of black smoke. That's why we'd rather live in the ground than join them. Uncle Zhang sighed.

"Yes, the Chen family has contributed a little bit of the remnants of the quenching technique, coupled with the Chen family's military power and personal combat power, there is a lot of power in Linjiang City, and the Martial Arts Association does not dare to disobey." Xia Yu said.

"Oh? Xia Yu, how do you know that the quenching body is a fragment? Jiang Zhong asked.

"I also felt a little wrong when I was cultivating, and I also had a punch with Chen Bufan later, and I felt even more puzzled, plus this aura revival is also a matter of this year, where did this body quenching trick come from, and why did it fall on the Chen family, so I have some doubts in my heart." Xia Yu said frankly.

"There are really some stories here, didn't you ask me about the whole set of exercises before the meal? Actually, it's one thing. I will tell you today. Jiang Zhong said.

"Thirty years ago, when I had just emerged in archaeology, Chen Yaoting's father's position was not high, and once in the joint archaeology of Kunlun Mountain, I found a suspected existence of the fourth civilization. In the end, we got two stone tablets with inscriptions, which we called the Book of Heaven. Jiang Chong took a sip of tea and continued.

"There is no way to verify this fourth civilization, so it has been deciphering the contents of the two heavenly books. In recent years, I have finally deciphered some information, one is the practice of refining the body, and the other is the body method. However, the decipherment is limited, and they are all fragments, and they don't know how to use them. Jiang Zhong introduced.

"Then the Chen family must be secretly deciphering behind their backs, otherwise Chen Bufan would not have been so significantly improved. Chen Yaoting will not become the first dragon-level god of war in Huaxia! Xia Yu said. Some old things have also figured out.

"That's right, when the cataclysm happened, we realized the usefulness of this heavenly book, but half of the quenching and deciphering parts were taken away by Chen Yaoting's father, which is also the cause of the rise of his Chen family." Jiang Zhong sighed.

"This Linjiang City has always wanted to encroach on us, one is the underground energy crystal ore, and the other is another fragment in the hands of Jiang Lao." Chief Zhang explained.

"Although I have the content of the original and the deciphered version, the personnel are limited, and it is difficult to carry out the decipherment work downward. And the Chen family can continue to decipher the quenching decision, once the distance between the two sides becomes larger, this underground world will not be safe! Jiang Zhong sighed.

"Fortunately, Uncle Zhang used to be a metallurgical engineer, and using the terrain and resources, we have survived to this day!" Xia Yu also explained to his brother.

"Elder Jiang, can you let me see this fragment?" Xia Yu asked.

"Of course, these two books are the rubbings and translations of the Book of Heaven, and I will give them to you." Jiang Lao said as he took out two booklets from his bag and handed them to Xia Yu. Xia Yu casually looked at a few pages, all of which were strange words.

"Isn't this the native dialect of Lord Gulie? I thought what the Fourth Civilization meant! The sound of the bastard ringed in my ears.

Xia Yu's brain exploded like thunder, this heavenly book, the bastard actually knew it.