After Zheng Yi and Niu Wang retreated into the tunnel, the monsters gathered outside the range of the purple light, roaring as usual but not approaching.

The King of Bull let out a deep breath, checked his armor and protective suit, and was surprised that he had no damage at all.

This is the great doctor in Sequence 6, he is really amazing.

You should know that in such underground sites, the most feared thing is damage to protective clothing. Ancient refuges without ecosystems were nearly Baidu, and the pressure was as high as hundreds of atmospheric pressures. If there were leaking cracks and there were crustal cavity near the cracks, it would cause high temperatures of more than 200 degrees in part.

Zheng Yi glanced at the gloves. The black one had just been covered with three fingers, which was far from enough. But he didn't force it anymore. After all, the relationship between the Niu King and him was very ordinary, and the other two sandy rookies were a bit unreliable. Their people on the surface made trouble again.

The two behind the palace quickly passed through the tunnel and returned to the starting point.

Asa was able to stand up, and the green crystal ball in her hand emitted a creepy green light. There was an extra corpse on the ground. From Zheng Yi's professional perspective, this was a corpse, and for ordinary people, this was a rotten meat.

"What's going on?" The bull king strode forward with a stern voice.

Asha said, "When we came over, we found that he... was thrown down. The lift was taken away."

The fluorescent rope that had originally hung down was gone, and the top was dark. I don’t know if it was because it was not dawn yet, or because the people above were working hard, even the entrance of the hole was blocked.

"Um..." Asa let out a muffled groan, and the crystal ball in her hand dimmed.

"What's going on?" Asha asked.

Asa gasped for two breaths and said, "They were attacked and all three of them were dead. After he was forced to confess, he threw it into the passage."

The bull king punched the hole wall: "Who did it!"

Asa was obviously very tired, and slowly sat down against the wall of the cave to recover her energy. After a long time, she said:

"I don't know, his soul dissipated very quickly, and I only saw the group of people wearing black leather jackets."

Asha turned around, her forehead against the warm hole wall, and gently pounded it twice.

Zheng Yi lay down on his back, and the tulip beam rushed straight up. Its prototype is a satellite logo lamp, composed of laser lamps, which is enough to pierce the complex atmospheric environment to transmit light to the ground. This channel well is only 5,000 meters, and the environment is stable, without clouds and airflow, and can easily shoot up above.

“It’s blocked.”

Zheng Yi used the light beam to confirm and told everyone about the tragedy.

The King of Bull suddenly laughed wildly and said, "It's okay, I'm not a rookie. I've asked my brothers to follow us long ago, and they will save me."

Zheng Yi said: "I hope your brothers are real brothers."

"What do you mean!" said the bull king angrily.

"That stone is stuck in the middle of the passage, neither up nor down." Zheng Yi had just measured the distance. The stone was located in the middle of the passage. The murderers above did not want to kill a few people to grab a car temporarily, but were determined to close the passage and trap the people inside to death below.

"These two girls are so stupid, where can we find such fierce enemies? And you let your brothers follow you... You don't think that the two teams are just like this in the wilderness. Isn't it a coincidence?" Zheng Yi said.

King Niu suddenly punched Zheng Yi.

Zheng Yi put on a three-layer shield, not dodging or avoiding, just like the breeze blowing his face.

The bull king turned around and thumped at the hole wall, and cracks were cracked from the high-grade reinforced cement.

"We are going to be trapped to death..." Asha's face looked desolate: "The water and food are on it."

Because those monsters cannot explore for too long and must be in and out quickly, water and food are invalid loads and are left on the surface.

"Can the warrior of Sequence 6 smash a stone with a diameter of about three meters?" Zheng Yi asked.

"How to borrow the power?" King Niu calmed down and gasped.

It is already very challenging to climb the cave wall two or three thousand meters. In addition, there is no focus, so it is really difficult to attack the stones. The greater possibility is to fall down and turn into meat sauce, but this seems to be very easy.

"Then we have to find another way." Zheng Yi said: "Although everyone is entering and exiting through the 'steal hole', there should be access and exit of this base itself, and maybe there is more than one."

"This is a ruin before the catastrophe." Asa took a break and said, "The ancients used rail transit to connect the surface."

"They have elevators, why do they have to work hard to dig tunnels?" asked the Niu Wang.

"The carrying capacity is large." Zheng Yi gave a reasonable explanation: "And it is cheap."

King Niu does not express his opinions, and he reads little, so it is better to express less opinions under such topics.

The technological level of Zheng Yi’s hometown is slightly similar to that of the two hundred years before the catastrophe here, so he is also considered a person with the thinking of the ancients. At that time, the ancients did not have the technology that was against the will of heaven and nearly infinite energy, so in large-scale engineering projects, they must consider the cost and construction progress.

While carrying out the main building body to the underground, a transportation tunnel was built at the annex to facilitate the transfer of building materials on the one hand, and on the other hand, it also facilitates large amounts of supplies in the future. Moreover, human society at that time was not mainly underground living, so the external commuting of staff must also be considered.

Zheng Yi used the end of the tulip to draw three circles on the hole wall and explained:

"The center is the internal elevator, that is, the pillar; we should be in the inner ring now, and the area for work, life and rest should be here. Then there must be an outer ring, which is the main external commuter channel.

“It should form a circling highway around the interior space, and for safety and accident response, its building specifications are higher than the inner ring area. Since the interior is still intact, there is no problem with the exterior.”

"We have to be as soon as possible before we run out of strength." The King of Niu took a deep breath: "Let's go! Escape first!"

The three-meter-tall warrior headed with two axes, Zheng Yi ranked second, and two women followed the last. The four of them left the tunnel, and the monsters outside had not dissipated yet, and were trying to overcome their instinctive fear to challenge the purple light.

The bull king, who was betrayed by his brother, immediately found the emotional outlet, and carried two axes and chopped down four of them.

Zheng Yi finally breathed a sigh of relief when he saw the black line on his gloves continue to grow. Although the process was not perfect, the result was acceptable.

"We walked closely to find a passage to the depths, where the outer ring should be connected." Zheng Yi said.

This work task is quite arduous. No one knows whether there is any hidden danger on this floor. In order to avoid unnecessary staff reduction, the Niu King is responsible for suppressing the monster craze. Asha holds an ultraviolet lamp to protect his flanks, and Zheng Yi takes on the work of searching the channel.
Chapter completed!