Chapter 405: Tunneling

On the holographic projection of the Challenger's half-dimensional battleship command center, a huge model of the building is slowly taking shape. The building www.biquge.info looks like an irregular stone, the surface is full of uneven marks, and over time, the stone not only does not stabilize its shape, but constantly makes irregular flipping movements.

"Are you sure it's Plan 2? Although Plan 2 is much safer than Plan 1, it is not very convenient. Of course, this is still in the case of our assumptions, otherwise, Plan 2 is completely a fantasy," the sparrow looked at the tumbling stones, and then at a large and orderly base next to him, and asked Eugene, who was frowning.

After deciding on the concealment plan, Biluo devised two underground base plans at Eugene's request. Choose a mountain, try to hollow it out from deep underground, and then build a standard planetary underground base in the hollow.

This kind of underground base has a very mature plan in the database of the Pioneer Group, after all, the Pioneer Group has done this kind of thing more than once or twice, and every time they go out on an expedition, especially when they do a short stay on an uninhabited planet or asteroid, they will build such a covered underground base underground, which has already formed a standard procedure. Such a base is not only hidden, but also has all the facilities available, which can fully meet the requirements of long-term residence.

The second option is more unique, which is to build an underground base in a sea of magma, constantly changing positions as the superstar's underground magma flows. In addition, several connecting passages are built under the superstar, and at certain intervals, the underground base and the passage are combined with each other to facilitate the handover of the base and the outgoing personnel.

Although the second option is more difficult, the security and concealment are several times higher than that of the first option. Of course, the successful implementation of Plan 2 must first solve several difficult problems.

The first is to overcome the long-term and continuous invasion of terrifying magma up to tens of thousands of degrees, and the second is to find ways to maintain the stability of the course in the underground magma torrent. Compared to the second one, the first one is a bit simpler. Whether it's a special high-temperature alloy or a construction crystal that uses a silicon crystal family, it can easily resist the terrifying heat.

On the contrary, it is particularly nerve-wracking to maintain the stability of the course in the magma. Fortunately, Biluo helped deal with these calculations, modeling and other problems, otherwise Eugene really couldn't solve it. But the premise of all this is that there is really a magma layer under the superstar, and if the entire continent is all piled up, then Plan 2 is a joke.

"I can't be too careful with what saves my life, I'd rather spend more time than cut corners, Mariliana is still at home waiting for me to return safely," Eugene said softly, but his thoughts were clear from the words.

"Biluo, connect to Cheng Mingli's personal communication" Eugene raised his head and ordered at Biluo's phantom.

"Understood" Biluo's answer was just over, and Eugene's voice came through the command link.

"Uncle Eugene, why are you communicating with me now, aren't you afraid that the signal will be intercepted by the enemy?" Eugene asked nervously.

"Don't worry, the Challenger's communications aren't something that the space station can detect. Boy, uncle has something to ask you for, drop the task at hand and let me make a hole from the surface directly to the core of the giant, as deep as you can, until you encounter the magma layer! ”

"Yes!" Eugene replied immediately, and then cut off the communication while muttering to himself: "Good boy, how deep and deep, this is a superstar of 120 million kilometers, do you want me to fight from one end to the other?"

"The second squadron, put down all the work at hand, follow me, we have a new mission" hurriedly greeted Li Mosen and Zhu Liren, and Cheng Mingli took the squadron of one hundred and fifty soldiers to drill deeper into the cave.

"Hey! Bring the little turtle with you, he's an engineer, maybe it will work! With a plop, Mingcan, who was wearing engineering uniforms, was kicked by Li Mosen to Cheng Mingli's side, and said with a smile.

"Thanks!" Cheng Mingli picked up the tea and drilled into the depths of the passage together. An hour later, the second squadron arrived at the end of the passage, calculated the direction, and Cheng Mingli's passage excavation officially began.

Of course, digging a passage to the core of the planet cannot be manual labor, Cheng Mingli used the sharp weapon of the civil engineering operation of the Golden Crow Fleet - the building plants of the green-skinned people. A simplified version of this plant has become the standard configuration of human social construction companies, which can quickly carve out a solid and stable underground passage on any planet, and also has a good living environment.

Of course, the building plants equipped by the pioneer regiment are much stronger than the simplified version of the folk one, I saw Ming Cang take out an ellipsoidal metal box from his body, slowly cut it to both sides, and took out a black lantern-like seed from the metal box and placed it in a vertical hole more than one meter deep with a laser beam in advance, and then poured a solution with a pale green luster into the vertical hole.

Strange to say, the surrounding temperature reached a terrifying minus 250 degrees, but the solution still did not freeze and still maintained its flowing properties. Following the vertical hole made by the laser, the green solution slowly flowed to the bottom of the vertical hole, soaking the lantern-like pitch-black seeds in it.

Five minutes later, there was a clattering sound, and with a surge in the ground, a green bulbous plant quickly expanded. Green tentacles slowly grow on the surface of the bulb, and the surface of the tentacles is constantly secreting clear sap. As the sap penetrates into the rock, it begins to soften rapidly, then turns into a black slurry, which is then sucked into the bulb by a straw that grows from the roots.

After inhaling the thick pulp, the bulb's expansion rate increased again, more green tentacles stretched out, and the bulb began to elongate rapidly, turning into a huge vine that continued to lengthen. The sound of clicking kept sounding, it was the sound of bulbs crushing rocks in the process of collision, and when Cheng Mingli came back to his senses from this shock, the underground passage had extended hundreds of meters towards the center of the earth.

"This is the third-generation building vine developed by the Academy of Life Sciences, and the military's purple-collar engineers are equipped with it, mainly used to quickly build a complete and usable underground base on the planet. Before use, the construction vine should be revived in a nutrient solution with hormones added to it, and then it can multiply rapidly.

Moreover, depending on the purpose of the project, the growth direction of the rattan can be built by adjusting the type and ratio of hormones in the nutrient solution. There is only one instruction in the nutrient solution I used just now, and that is to keep growing downwards until the conditions no longer meet the living environment of the building vine," Ming Cang pointed to the bulb root that had grown out of the hatch and introduced it to Cheng Mingli.

The hatch resembles a stomata on a plant leaf, formed by two half-moon-shaped tissues closed against each other. After Ming Cang entered the corresponding pheromones, the stomata began to shrink, revealing the annular channel inside. The diameter of the passage is about ten meters, and the material looks somewhat similar to the interior of the first-generation plant warship that has been retired from active service.

The passage was less than five hundred meters long, and there was a sealed door behind it, which was somewhat similar to the airtight compartment in a spaceship built by civilizations that had not developed shield technology, where the crew pulled out air when they went out, and everyone rushed into the air after they entered.

When everyone had entered, the half-moon hatch dilated, the passage closed, and a large amount of air filled in from all sides of the passage, and the sealed door at the end of the passage began to open only when the air pressure had stabilized.

"It's not like I've never seen architectural plants before, but they look very different from what you use," Cheng Mingli said as he followed Mingcan's side.

"Of course, you are using the first generation of civilian building plants, commonly known as digging vines, which are the weakened versions of the civilian ones deliberately launched by the Salvation Organization, and only have the function of building a preliminary underground base. But I'm already in the third generation, and I just cultivated it three years ago, and its functions are much more powerful than the previous two generations.

If nothing else, we're heading underground, but if you look at the direction of gravity in the passage, it's not pointing to the center of the earth at all, it's perpendicular to the wall of the passage. Automatically adjusting local gravity, which is one of the features of the third-generation architectural vine," says Ming.

"We don't even have this thing, how can you be a foreigner?" Lu Biaofei, the captain of the first squad behind Cheng Mingli, asked bluntly, without considering whether this question would make Mingcang feel embarrassed.

"Fifteen years ago, I passed the citizenship assessment and officially became an honorary citizen of the Golden Crow Fleet. Four years ago, I successfully qualified as a Purple Collar Engineer and obtained a quota for the allocation of restricted items. As long as I don't jeopardize the safety of the fleet, I'm allowed," Ming Cang was not angry, as if he was stating an established fact.

The Purple Collar Engineer has almost reached the ultimate achievement of the engineers of the Golden Crow Fleet, and even in the Salvation Organization full of talents, he is a figure at the level of a great scientist. It is very rare for Ming Cang to stand out from a little-known Cangyan civilization.

After becoming a purple-collar engineer, he will generally be recruited by the scientific research department under the Salvation Organization, although Mingcang rejected the olive branch of the Mechanical Engineering Institute, but according to the standards, the standard configuration of purple-collar engineers still has his share. However, the monitoring is correspondingly stricter, and the semi-intelligent assistant program equipped with Ming Cang has instructions to supervise Ming Cang's use of these restricted items, which can lock or even destroy Ming Cang's space watch at a critical moment, and can even end Ming Cang's life in extreme cases. (To be continued.) )