Doomsday: I Build an Infinite Train.

Chapter 402 Planet Titan
In Dawn City, north of Qingbo, a large convoy of survivors marched along land and rail roads toward Jinhe Tianji.

Under the sunlight, a convoy of millions of people moved with tremendous force, raising clouds of dust as it slowly and orderly moved toward the horizon. This was not a rout, but a well-prepared migration.

All kinds of vehicles were packed with people. The pickup truck bed, laden with supplies, was stuffed with folded tents, buckets, solar panels and other supplies. The driver’s cab was crowded with a family of four. The man driving had bandages on his body, one hand on the steering wheel and the other holding a half-smoked cigarette. The ash drifted in the wind like tiny snowflakes.

A modified off-road vehicle had a basket made of sheet metal and old clothes hanging on its back. A golden retriever lay warily inside, its tongue lolling out. It was used to traveling through dust and smoke, watching all sorts of strange modified vehicles in the traffic.

Some large trucks modified with all-terrain tracks roared along the way, crushing the ground with layers of track marks. Along the way, supply vehicles and drones with Phoenix Society holographic lights were following the convoy. You can directly contact the staff above using frequency division communication to get medical or emergency assistance. All the blood essence you get can be exchanged for new blood essence coins at Phoenix Society, or stored in special identification cards for the purchase or trading of supplies.

After a fierce battle, the 83rd Iron Guard Brigade marched in mechanized formation, stretching several kilometers along the rear of the convoy. In the sky, the fleet and the Zhentian warship flew low overhead, casting large shadows and blocking out the sunlight.

In a special medical cabin, Chu Yan slowly opened her eyes. What she saw was a dimly lit room, followed by multiple medical tubes connected to her head and chest. The medical instruments beside the bed emitted a low heartbeat sound.

After being in a near-death coma for ten days, Chu Yan finally woke up. This time, she appeared in Lin Xian's consciousness, but this only happened in the last few days. However, Xu Zhenyue, Ye Lan and the others were relieved to learn this from Lin Xian.

Upon waking up, just as Lin Xian had said, Chu Yan discovered that her surroundings had changed considerably. She no longer saw her previous mission team, but instead was replaced by a Night Stalker squad to protect her.

"Chu Yan".

In the office, Ye Lan, whose hair was completely gray, was wearing reading glasses and intently reviewing several documents. She said to Chu Yan, who had just entered the office, "Welcome back to the team."

"Don't you need me to carry out any missions now?" Chu Yan asked.

Ye Lan shook his head: "After mastering the dark energy conversion technology, all the elites in our Nightwalker departments can carry out Star Abyss exploration missions. Although there are still many unknowns and some technical problems related to communication and cold dark particles, the overall survival rate has been greatly improved."

As she put down the documents, she looked at Chu Yan: "You and Lin Xian are currently the only two people on Blue Star who can contact Nantianmen. Before we break through the dark energy nuclear fusion technology, this defense platform is an important weapon for us, even..."

"I also told Lin Xian that I hope he will not use the attack on Nantianmen unless absolutely necessary."

Chu Yan took a deep breath: "I know that the corpse driver was greatly weakened by the Gray Mist Envoy and the entire army, and the Tongshi Tower restricted his recovery of dark energy, which is why Nantianmen found an opportunity to kill him in one blow."

Ye Lan nodded: "Lin Xian is a very smart person, and he knows this too. Currently, the most destructive weapons for mankind, besides biochemical weapons, are only thermonuclear weapons and high-energy confinement weapons. But Operation Keder tells us that even a thermonuclear weapon with the equivalent of 6 million tons of TNT cannot destroy the dominant creature in the Star Abyss. This may not just be a problem with weapons."

Chu Yan fell silent upon hearing this. Ye Lan's words and Lin Xian's thoughts were similar; both wanted to break through the current human technology to cope with the situation. This was certainly feasible. However, in Chu Yan's view, if it weren't for the possibility of the growth of mechanical superpowers mentioned by Lin Xian, it would be hard to imagine that humanity could break through the constraints of physics in such a short time.

Ye Lan seemed to see through Chu Yan's doubts and said directly, "I know what you're worried about, Chu Yan. Your thinking is correct. The Emperor Project is the limit of our current technology in the short term. However, the research on the flesh-and-blood armor in the Crimson World has also given us a lot of inspiration. It also includes issues such as the energy potential traps in the Star Abyss and the special defensive force fields of the dark creatures. These are also the main directions we are currently studying and working on..."

Chu Yan said, "Are we going to study the abilities of the Star Abyss creatures?"

"Not only that," Ye Lan said, taking off her glasses and wiping them. "S-class beings, corpse drivers, abyssal demons, and the currently discovered world-class disasters numbered 1-7—we must begin preparing to probe and study these beings. For example, the giant crustal parasitic organism [Planet Devourer] No. 1 in the Siberian Star Abyss No. 01, and No. 03, which you previously tracked and investigated from Jiang City..."

"Floating Giant Corpse".

Chu Yan frowned slightly: "Since we discovered that floating giant corpse, we have never detected any biological fluctuations or signs of awakening on it. This thing has been flying eastward at an altitude of about 3000 meters. There is a huge amount of dark invasion radiation and a chaotic spatial force field around it. Even the most elite ability users would find it difficult to get close to investigate."

"Therefore, I dispatched Night Stalker Division 2 to begin a comprehensive investigation into the floating giant corpse. Creatures 1 and 3 are, so far, not showing any aggressive behavior besides the invasion of darkness, and..."

Ye Lan looked at Chu Yan as she spoke: "Our forward observation team has discovered that the floating giant corpse reached the skies over Longjiang three days ago. Judging by its speed, it will pass through Shuguang City within two weeks at the earliest. This is a considerable hidden danger for us."

Upon hearing this, Chu Yan immediately asked, "Teacher Ye, can my group join this investigation project?"

"No."

Ye Lan directly refused, saying, "Lin Xian should have told you that he is now heading to the polar regions via ocean orbit. We must ensure your safety, so I have discussed it with General Xu. You will not be doing any field work for the time being. Moreover, your body has suffered considerable aftereffects from this crisis, and you need time to rest."

Chu Yan wanted to say something, but seeing Ye Lan's calm and unwavering expression, she could only nod.

"Okay, I will follow the organization's arrangements."

……

Yongcheng Port, the ocean shore-based docking port of the circum-space orbit, is now a desolate place. Zombies can be seen everywhere in the loading and unloading area and the port. Occasionally, the sound of the wind will cause a few howls.

The crimson sunset, like a dying ember, burned the high clouds in the sky red on the horizon.

The Mugen train rested quietly on a loading platform near the coastline. Outside the window, the Pacific coast shimmered in the twilight. The remnants of other freight trains and the offshore traction platforms, which were also mottled, were parked on the loading platform. The iron sheets of those trains were eroded by the sea wind, leaving mottled marks, like the skeletons of stranded giant beasts. The massive ocean track was supported by giant pillars of the ocean ridge, extending from the port into the depths of the sea.

At the port dock, containers were stacked crookedly, their paint peeling off to reveal the rotting cargo inside. Several zombies wandered slowly in the shadows, their steps dragging, occasionally bumping into overturned forklifts, the metallic clanging sound particularly jarring in the silence.

The second round of searches of the ground and low-altitude areas has been completed, and no high-threat organisms or other humans were found.

Viola piloted several mobile mechs and aerial drones, searching throughout the port. Chen Sixuan and Ning Jing had already prepared for nightfall on the train. Inside carriage number 2, Sasha gazed out the window at the boundless Pacific Ocean, her eyes gleaming.

"This is my first time riding a train into the ocean orbit section. It looks so scary! How were these orbital systems built in the deep sea?"

“You’ve come to the right person.” KIKI sat in her swivel chair with her legs propped up on the table, twirling a black pen deftly in her fingers as she asked Sasha, “Do you know the original design concept for a planetary orbit?”

Sasha shook her head.

KIKI raised one finger and drew a spiral in the air, then kept increasing the size of the spiral.

"Simply put, it's about building a channel along the equator that can circle the entire planet and ascend to near-Earth orbit in a rising manner. You can imagine it as a spiral of a yo-yo. The ultimate goal is a planetary ring, a permanent space orbit that can directly transport goods between Earth and the Moon via tractors."

"Huh? Then why not just use a space elevator or a spacecraft to transport them?" Sasha asked.

"You don't understand, that's called a century plan."

KIKI smiled slightly and said, "Have you heard of the Dyson Sphere project?"

Sasha nodded: "I've heard of it, building a giant artificial structure to envelop the entire star and obtain a sustainable energy source?" "That's right, but what we on Earth want to do is not just that. We want to start building this energy ring around ourselves in Earth's near-Earth orbit, creating a space mechanical ring for energy capture. However, this plan is difficult to achieve within a few hundred years, so it has been divided into several preliminary steps. The first step is to build a lunar planetary ring, and then establish a high-altitude orbit by using a suspended orbit, just like the one in Yubei City."

“4800 meters?” Sasha pondered. “But there’s a limit to orbital altitude, right? Limited by materials, this is much more difficult than a space elevator.”

“It’s not that difficult. Materials are one thing, cost is another.” KIKI said, twirling her pen. “If you want to build an orbit above 5000 meters, you can’t build a foundation pillar. So you have to think of the orbit as a cable, extending from the Earth’s surface to the Earth’s geosynchronous orbit. In addition to its own weight, it also has tensile strength. This becomes a spiral cable that is released through the balance of centrifugal force and gravity. The Moon Ring is that kite.”

"Is the ultimate goal to create a planetary ring system?"

“Yes, the logic is the same as transforming a cable into an orbit, and then gradually building a space city. So the problem that needs to be solved for the planetary ring system is transportation capacity. If we want to build such a large space megastructure, the transportation capacity of a space elevator is not enough.” KIKI spread her arms and said loudly, “We need a highway to near-Earth orbit, an orbit!”

Inside carriage number 1, Lin Xian closed his eyes in deep thought, his consciousness already inside the Black Star Forge.

[Current Mechanical Heart Level: LV.6 (5520/50000)]

[Mechanical Awakening]: Mechanical Lord
Mechanical Devouring: 6 (300/5000) Increases devouring efficiency

Mechanical Manufacturing: 6 (1560/5000) Improve construction efficiency

[Special Skills]

Mechanical Energy Cannon [Amplification]

AT Field [Amplification]

Superstring reactor phase iris [amplification]

Flashback (Rare) (Level 3)
Magnetic storm oscillation (rare) (Level 1, 60%)

Gravitational Lens (Legendary) (Level 2, 50%)

[Currently Available Skills for Enhancement]

Flashback (Rare) (Level 3, Max Level): Can be amplified to: [Energy Leap]

Amplification materials: Titanium alloy *100, Hot-rolled forged steel *100, Supercarbylene alloy *100
Increase time: 29 hours
"Energy leap?" Lin Xian frowned slightly. "That sounds pretty good."

To Lin Xian's surprise, this enhancement didn't require too many demanding materials, and he directly chose the enhancement option.

[Initiating Flashback - Mechanical Amplification]

[Mechanical Amplification Begins: Flashback 28:59:59]

Flashback was a crucial skill for Lin Xian during his train survival journey, helping him avoid countless dangers. However, this skill became somewhat ineffective when facing large-scale monster hordes later on. Nevertheless, Lin Xian still urgently needed a skill for rapid mobility and dodging danger, since he no longer had Flash Bullets. Those were with Grace, and if he teleported to the Southern Heavenly Gate, he wouldn't be able to return...

Congratulations! You have obtained the Star Predator XR01 mech (blueprint)

The lights in the R&D center were flashing. Lin Xian opened the door and his face immediately darkened.

"really……"

He had been looking forward to the Vulcan mech upgrade blueprint for a long time. If it had been before the battle of Dawn City, he would have been overjoyed with this interstellar predator blueprint. But now that he had already obtained the blueprints for the Emperor Project super mech and the Crimson World flesh and blood armor, this blueprint was better than nothing to him.

"With the assistance of Shinji Mochizuki and Professor Ye, I already have the blueprints for humanity's most advanced technological mechs, including the interstellar-class nano-powered armor and the current Emperor mech. If the Phoenix is ​​further improved, the Emperor mech should be close to being able to contend with S-class mechs. The only problem is the defensive force field. Apart from that, it will be difficult to achieve any further breakthroughs."

Inside the Black Star Forge, Lin Xian sighed. Looking at the massive space, a huge interstellar train was suspended within it, and all six manufacturing lines were operating at full capacity. Shinji Mochizuki had designed an improved blueprint for an armory ship, which Lin Xian was manufacturing using existing resources. In addition, Lin Xian was also preparing to build a set of suppressor devices for flesh and blood implants as a precaution.

In the battle of Dawn City, the Phoenix Society and all the survivors obtained a large amount of Blood Essence. Blood Essence was piled up like mountains in the corpse mountain outside the city, and countless superhumans also received a huge boost. Lin Xian obtained 5000 Mechanical Source Points through the conversion of the Infinite Hell Black Chrysanthemum. And this was only what he obtained in battle. Now, there is a crashed Dreadnought in Lin Xian's Black Star Forge. He took it from Ye Lan and planned to use it to devour materials and upgrade.

"what……"

Just as Lin Xian was about to exit the Black Star Forge space, he suddenly saw that the blueprints for the Interstellar Predator XR01 mecha were still floating in the research and development center.

"Wait a minute, isn't this blueprint still in progress?"

Mech blueprints that have been developed to their limit should theoretically not be able to be put into the research and development center anymore. At this moment, Lin Xian felt a chill and tentatively opened it.

The next instant, a light screen appeared that made Lin Xian gasp in shock.

This blueprint has reached the [Celestial] level and is ready for [Planetary] level research. It requires a Mechanical Heart and a Mechanical Manufacturing level of 7.

[Planetary Titan Mech (Blueprint) Development Time: ****]

[Requires 6000 qubits of computing power to join]

"Did I... see wrong?"

Lin Xian rubbed his eyes. After awakening at level 6, he hadn't paid attention to the development progress of the unfinished Vulcan mecha. He only knew that the development time had been greatly shortened. But now, he suddenly realized that the entire research and development center seemed to have undergone earth-shattering changes. Not only were the levels of power armor and mecha clearly defined, but they also needed to be connected to computing power. This made Lin Xian's hair stand on end.

“[Planetary level]…”

Lin Xian looked stunned.

"Have humans already developed mechs of this caliber?"

(End of this chapter)