Although Chen Kai and the others knew that the demon patrols around them were very strong, Chen Kai and the others still rushed in, and after hiding in the hole they had dug in Fei Yun, everyone's heartbeat was definitely more than one hundred and eighty miles, and the high-speed beating hearts seemed to jump out of their chests. But after entering the safe cave, everyone's hearts suddenly relaxed a lot, and the tense nerves instantly relaxed, and as a result, everyone was paralyzed on the ground and couldn't move. The result of this resembling a highly stressful workout is that everyone's body falls in half almost instantly, because they are all tired.

"***, this is probably the first time I've run so fast in a game and I'm still running with my body down!" Chen Kai lay directly on the hard and cold ground, panting heavily, and beside him lay Zhao Tiezhu and Su Xinghe, who were also tired, while Fei Yun and a few thieves were constantly responding to other companions who rushed over while alerting the surrounding situation. When the last player staggered and rolled into the hole and rolled into the hole with the others, Fei Yun and the others left, waving the dirt to seal the hole, leaving only a few well-made pipes as vents.

"Don't say it! You run really fast enough, it is estimated that only Lu Xiaofeng is a little faster than you! Zhao Tiezhu gasped on the ground and said, in the last part of the distance from the hiding place, almost everyone in the bottom of the box used the running skill at the bottom of the box. Whether it was Chen Kai's Phantom Step or Blood Sea Peak's Death Phantom Step, their Death Phantom Step was not tolerated in the use of their fighting spirit, but compared to Lu Xiaofeng, who was the best at running, they were still a little behind, at least before they rushed into the hole, the other party still rolled and hid.

"It's not just a little faster, it's a lot faster!" Chen Kaike is very aware of Lu Xiaofeng's final speed, which is almost terrifying and close to shrinking into inches, and the high speed is definitely more than a star and a half faster than Chen Kai in the short-distance sprint, if it is not for the endurance is not long, it is estimated that Chen Kai will be thrown by the other party, and he doesn't know where he is.

"That's it! Instead of discussing who is fast and who is slow, let's think about how to go, shall we? After such a large group of you people ran away without concealment, it is estimated that the entire wilderness is full of human footprints, and if those footprints are discovered by the demons, we will have to shrink down here for several days! The dark dagger sighed and said, although he knew that if Chen Kai and the others didn't sprint at high speed, the chance of encountering demons would definitely be higher.

"What else can I do? Let's dig straight into the tunnel! Dig one kilometer a day, ten days and a half moon, and definitely dig under the Demon Gate! Xue Haifeng gasped and stood up and said, in fact, although his idea was rather rancid, it could not be said that it was not a solution. Of course, this method is absolutely costly and unreliable, digging in the deep underground will collapse and everyone will be buried alive. Even if you are lucky enough not to encounter a landslide, it is a huge problem to find the direction underground, and the worst thing is that you dig for a long time, not only do you not get close to the devil's gate, but dig farther and farther, and then you don't even have a place to cry.

However, although the underground excavation path cannot be used to lead directly to the Demon Gate, it can be used to temporarily stagger the time to meet the Demon Patrol. As long as Chen Kai and the others are ready, they can stagger the demon patrols by digging a certain distance towards the Demon Gate in a straight direction, and then take advantage of the night to reappear on the wilderness to determine the direction before digging the tunnel. With enough time, they will be able to evade the Demon Patrols and enter the heart of the Demon Gate.

Of course, this is definitely a terrible project, although the underground soil is formed after the silt in the swamp has been sucked dry, and most of it is in the form of blocks, as long as you dig lightly, you can dig up a large block, and the speed of the project will be much larger. However, the direct softness of the upper and lower soil is different, and if you are not prepared, once the soil layer on top collapses, then it will definitely not be a few people who will die. Therefore, Chen Kai and the others took the solid soil they dug out as bricks, and then wet it with water and built it in the tunnel, although it may not be as strong as the stones, but they always have a sense of security.

After hastily formulating the mole-like method of action of digging tunnels, Chen Kai and all of them devoted themselves to this relatively huge project, using the cover of night for nearly 200 people to dig hard in the underground space. After Chen Kai and the others dug all night, a terrifying roar came from the top of their heads, and the demons found Chen Kai's footprints and began to work hard to make craters in the wilderness again. A large amount of sediment was shaken down from the top of the pit by the shaking of the earth, which made Chen Kai and them nervous for a while, and at this time, most of them stopped what they were doing, and only a few people were still working hard to dig the passage. The player who stopped digging did not relax, but worked hard to pile up clods of earth and wood in the underground space to support the soil layer above, obviously Chen Kai and they found that this time the demon seemed to be really moving, and the intensity of the attack was absolutely terrifying. When the first clod of earth fell from the top of Chen Kai's head, no one thought that the underground space would be safe, so everyone struggled to hold up the loose soil layer with planks and wood.

The shaking ground made this simple task extremely troublesome, and the constant roar made it even more terrifying, and they seemed to be able to see the entire ground caving down and burying them alive. However, in the end, after struggling for nearly half an hour, all the roar disappeared, and only the faint glow crystal that fell to the ground was still trying to emit a ghostly light, illuminating Chen Kai's wolf bèi's face.

"They're gone?" Chen Kai turned his stiff head and asked Fan Kerry on the side, his back pressed against a wooden plank. There was another terrible crack line on the top of the wooden plank, almost cracking into several knots, but because it was held against by Chen Kai, this wooden board was not completely broken, and it still stubbornly supported the earthen wall behind it.

"I don't know! But for the time being, we should be safe, and try to strengthen the surrounding earthen walls~! Van Clery was also exhausted at the moment, his hands were propping up a plank, the height of the entire underground space was less than two meters, and he was holding the plank with both hands, and the upper layer of soil in the underground space was on top. Although there was a large amount of wood as a pillar, the soil layer still collapsed, so Van Clery and the others needed to use their bodies as pillars to support the ceiling with the wood.

At this moment, there was a sudden loud tremor on the ground in the distance, and it felt like a huge rock hitting the ground. On the ground, this kind of vibration may make people's feet shake at most, but underground, it is very clearly reflected in everyone's feelings, and the feeling of mud and sand makes people wonder if the underground space will collapse under this vibration.

"Could it be that rock camp we dug has been discovered?" Chen Kai turned his stiff neck and asked Zhao Tiezhu and Su Xinghe beside him, one of them held the sky with both hands, and together with Fan Clery, he pushed against the ceiling above his head, and the other used his body against the earthen wall behind him like Chen Kai.

"Possibly! But the vibration shouldn't be so violent! Su Xinghe said with a frown, because he felt that even if their previous camp was found to have collapsed, it would not produce such a terrible shock, which was like a terrible shock produced by a giant trying to pound the ground.

In fact, it was not a giant that was stored above Chen Kai's head, but a terrifying creature comparable to a giant, a Behemoth beast with a body length of more than thirty meters. It was nothing else that caused the terrifying tremor on the ground, it was the great earthquake tremor released by this Beth giant beast with demonic horns, and the terrifying seismic wave spread out the moment its legs hit the ground, creating an earthquake-like effect on the ground that spread to a range of hundreds of meters. Chen Kai and the others were unlucky enough to be within the diffusion range of this seismic wave, so they felt a terrifying tremor like a magnitude seven or eight earthquake. If it weren't for the fact that they hadn't let their guard down and kept trying to support the soil layer and walls, it is estimated that the entire underground space would have been completely destroyed under a single blow.

After this seismic wave, this Behemoth would release a terrifying seismic wave every other distance, allowing Chen Kai and the others to experience the terrifying feeling of trembling again. The ground under their feet cracked under this seismic fluctuation, and this terrible tremor lasted for nearly ten minutes before gradually disappearing from Chen Kai's perception, and after the tremor disappeared, everyone was so tired that they wanted to lie down but they forced themselves not to lie down. Players who weren't involved in supporting the wall worked hard to patch up the soil layer and then erected several tall earthen pillars against the ceiling.

"It's finally over, and if it doesn't end, Lao Tzu will exhaust himself to death without the demon to clean it up!" Fei Yun, who was sitting on the ground, panted and said, in fact, not only him, but also others, after making sure that it was safe, everyone was paralyzed on the ground and tried to eat and recover. At this moment, they had a deeper understanding of the demon's strength, and the monster that could penetrate the stratum up to three meters thick and cause the soil layer below to fluctuate violently like an earthquake was definitely terrifying.

"Yes! Let's hope that's all there is! Su Xinghe bit the hard jerky and said, listening to his words, everyone fell into silence, and their dusty faces exuded depression and loneliness under the light of the shimmering crystal, at this moment, they found that the path they had chosen to complete the task was so difficult and endless difficulties appeared in front of them one by one, so that everyone had the intention of retreating.

"What's wrong? What's wrong? Isn't that the difficulty? Let's not forget that even if we go back now, the mission is basically overfulfilled, and the distance we are exploring now is more than the Stronghold Commander imagined. As long as we go back and hand over the collected information back, even if we are hung back, we will definitely be able to complete the task, and now we are just overcompleting the task of the system and increasing the trial reward, why are you all depressed! The dagger looked at the others through the dim shimmering crystal, and began to cheer them on.

"But Darkhead, how can you be sure that our mission will be completed after hanging back, after all, the mission requires us to live to bring back the news we have obtained!" One thief apparently disagrees with the dagger, and he refutes the dagger with the description of the mission, and in fact the others think the same.

"So what do you say now? Back off? No kidding, the demons outside are almost crazy to search for our traces, and we have made trouble like this twice, I estimate that the patrol intensity of the outer layer is almost the same as that of the core! Now going out is basically looking for death, it's better to rush inside, after all, the task of the system is the most special, who knows if you will directly activate the completion mode and then enter the special link! T-boy waved the shovel with his remaining arm and said, although his words were not particularly popular, but they also represented a fact, like Chen Kai and Zhao Tiezhu did not hand in the task and completed the trial directly, because they belonged to the category of completing the task beyond a certain amount.

“…… Are you sure we'll be able to make it to the point where we can go straight to the trial? A thief doesn't believe T-boy's words because he thinks it's too hard, too hard, and if he wants to overdo it, he definitely needs to rush into the heart of the demon's gate. Now it's so terrifying just in the outer areas, and God knows what will be in the core.

"I'm sure, of course, if you dig 100 meters per hour from now on!" T-boy nodded seriously, and with his black but unusually sincere-looking face, everyone had a certain trust in his words.

After a period of rest, most of the human body began a new round of work, although the others did not believe T T's words very much, but they could not find a reason to refute for the time being, and they also did not have the courage to escape from the demon after leaving the team, so they could only mix in the team and try to dig holes. The deep cavern continued to dig north under Chen Kai's efforts, and after Chen Kai and his men had dug for nearly a kilometer, the rock camp that they had originally used as coordinates disappeared from the map after a flicker. Although Chen Kai and the others didn't know what was going on, they could know that the camp had been wiped off the map, and it was definitely the one who caused the seismic waves.

"We've got to pick up the pace, if those demons don't find our bodies underneath the rock camp, they'll probably turn around and search the top of our heads again! But there should be a little more time, after all, they don't know where we're hiding? Chen Kai touched his head and closed the system map, because they have been underground, the orientation on the system map has not changed, and only after leaving the underground will they regain new coordinates and positions to determine the direction. Especially after the coordinates of the rock camp disappeared, it became more difficult to determine the direction, and the system map only had the general surrounding environment but not the north-south direction, and all the information had to be mastered by the player relying on the things in the game. Chen Kai: They had no way to use the spell pointer to determine the direction, and they could originally use the rock camp as a coordinate to determine the direction, but now they can only rely on the records left to determine the direction of the excavation.

Everyone knew that there was not much time left for them, and once the demons reacted and came back to release the seismic waves, the underground space that was no longer empty would definitely collapse in an instant, and then they would lose their second coordinate point and could only touch around like blind people in the dark underground. Therefore, in order to prevent an emergency, Chen Kai had to separate some people to dig a new camp underground, a small cave that was even smaller and less than ten square meters. There can only be one tent in the camp, and everyone can only take turns offline through guò to ensure that the camp is not crowded. But this small cave is very strong, at least much more earthquake-resistant than the original camp.

The walls of the camp were covered with all the rocks that Chen Kai had dug up, and each rock was directly glued together with wet mud and then fixed with wooden planks and embedded in the earthen wall. Although this kind of rock and earth wall is not as strong as a concrete brick wall, it is much stronger than an ordinary earth wall. Of course, this kind of solidity is also relative, if the front is earthquake** and it is absolutely a mess of collapse, even if Chen Kai and they are supported by wooden pillars, it is useless. Even so, this camp is very important to Chen Kai, because it is an important oxygen supply point, and there is a vent dug by Chen Kai and his people on top of it, and a large amount of air is transported through the cracks under the rocks above Guò, and it also allows Chen Kai and his team to confirm the direction and continue digging north.

Chen Kai and the others almost took turns to fight, each of them had plenty of rest time, the working surface of the tunnel could accommodate three people to dig, while the others loaded the dirt into their backpacks and transported it to the original underground space and dumped it into it, gradually submerging it in the dirt to destroy the relics they had been active there. At the same time, the tunnel behind is constantly blocked, forming a passage in the ground that is dug in front of the front and blocked in the back, of course, this passage is very loosely blocked, and it can be dug up again at any time. This is actually the back road that Chen Kai and the others left for themselves, although this back road is not very long, and even the exit is within the range of the demon's control, but it is an out-and-out way of life.

In such a time of digging and burying, Chen Kai spent nearly eight days underground, and at the same time, they also really entered the hinterland of the Demon Gate, because they dug nearly two kilometers of tunnels almost every day, and the sleepless work made everyone's spirits extremely tired, but they were also extremely excited. Because he was only less than twenty kilometers away from the Demon Gate at the moment, as long as he climbed outside, he could see the huge black terror gate towering in the sky in the distance. At the same time, you can also see the two terrifying black pillars of fire rising into the sky on both sides of the door, and the huge pillars of fire illuminate the surrounding qiē like two black light sources.

"Doesn't seem to be very well guarded here!" When Fei Yun and a few other thieves and old thieves Kashgar were ordered to go out to explore the way, they found that there were not many real patrol troops in this seemingly well-protected core area, even fewer than the demons wandering outside. Perhaps because too many demons were mobilized by them to the periphery of the Demon Gate, there was an emptiness in the defenses inside the guide, which gave Chen Kai and them a very good opportunity, and after observing for a night, Fei Yun and the others recorded the number and range of demon patrols that passed around and then returned to the cave. Chen Kai, who was dressed in darkness in the cave like an African refugee, was busy underground, except for the players who went online from the tent, more were sitting around eating together, everyone was waiting for news intently, waiting for Fei Yun to bring good news from outside.