Those who reincarnate must die.

In this world's army, men and women can both enlist. Although they live in separate barracks, they spend all their time together in the same fortress, and it's inevitable that some will develop feelings for each other. However, romantic relationships in the army can undermine morale and affect combat effectiveness, so romantic relationships between men and women are strictly prohibited in the military!

The two were caught having a secret rendezvous by Feng Xi and Zhang Lang, and were naturally terrified...

Feng Xi stood up, her face flushed, and coughed, "What...are you doing?"

"This..." The two exchanged a furtive glance, not daring to say anything...

"General Feng is asking you a question!" Zhang Lang's deep voice sent a chill down their spines...

Over the past few days, countless soldiers had witnessed Zhang Lang's figure slaying the Zerg on the city wall. Especially today, his brutal killing of three Hell Centipedes, their brains bursting out, earned him the title of "God of Slaughter" among the soldiers.

It could be said that his fearsome reputation in the army was now more effective than that of the marshal! These two men, fearing that Zhang Lang might tear their skulls off in a fit of rage, could only reply:

"Reporting to Lord Hunter... we two have long harbored feelings for each other in the army, but military regulations prevent us from being together... We had originally agreed to return to our hometowns and get married after the war... But today, after several encounters with that insect, if it weren't for Lord Hunter's divine might, we would probably be torn to pieces... We escaped this calamity today, but perhaps tomorrow, once we climb the city walls, it will be a one-way trip. So... rather than regret it for the rest of our lives, it's better to seize the moment now..."

It turned out they were a pair of star-crossed lovers. Zhang Lang sighed, while Feng Xi blushed beside him.

"That's still unacceptable. Doing such a shameful thing in the camp at night... Your mouth was practically on hers! What if her tongue falls off? What if she gets pregnant? What will happen then? Where in the military camp is there a pregnant woman to hide?"

"Huh?" The young couple were stunned by her words, and Zhang Lang, standing nearby, also turned around, looking completely bewildered: "Who told you the child came from the tongue?"

"Isn't that right?" Feng Xi looked completely bewildered. "My mother told me!"

"Does that mean married men have lost their tongues?"

"My mother said that if a man's tongue is swallowed by a woman, it will grow back..." Feng Xi said with absolute certainty, "But if it's cut off with a knife, it won't grow back? That's amazing, isn't it?"

"It's amazing..." Zhang Lang was speechless for a moment, then suddenly realized that although she was a seasoned veteran, this was still just a seventeen-year-old girl...

"In short, this is a violation of military regulations!" Feng Xi pointed at the couple, her face flushed. "According to military law... you..."

As she spoke, Feng Xi glanced at Zhang Lang, her eyes seemingly filled with reluctance.

Zhang Lang sighed: "You two..."

When they heard Zhang Lang call their names, both of them shuddered...

"Go back to sleep!" Zhang Lang coughed. "Everyone go back to your own place! All this fussing around so late at night, aren't you afraid your legs will give way when you go to town tomorrow?"

"Huh?" The two looked up at Zhang Lang. "You're not going to punish us?"

"Still want to be punished?"

"No, no, no, no..." The two shook their heads like rattles, and got up to leave.

"Wait!" Zhang Lang called out to them, startling the two men so much that they froze instantly, trembling like leaves.

"Go back and get some rest. Be smart during tomorrow's battle!" Zhang Lang looked at the two of them and said firmly, "We will definitely win this battle! When we return to our hometown, we'll marry them properly!"

The two turned around in surprise, took each other's hands, bowed to Zhang Lang, and said, "Thank you..." before leaving.

"I didn't expect you to be so ruthless when killing insects, yet so kind to people!" Feng Xi seemed quite satisfied with this outcome.

Zhang Lang shook his head: "My hometown is gone... I don't want them to suffer the same tragedy as me..."

Feng Xi looked at Zhang Lang: "You... are you all alone now?"

"Looking at it this way, we're quite alike!" Zhang Lang sighed.

"Yes!" Feng Xi laughed, "Besides, we even share a common hobby: killing bugs! Ah, I so hope your promise to those two comes true, that we'll definitely win... Victory in this war seems so far away..."

"We will win!" Zhang Lang clenched his fists, gazing intently northward, his eyes deep and unfathomable, as if trying to see through the city walls and the vast wilderness. "There must be a way!"

Just then, Zhang Lang received a message from Fang Tianhua via his communicator: "The research on the insects has yielded results!"

Zhang Lang glanced at her casually and said to Feng Xi, "You must be tired today. I'll take you home to rest!"

After escorting Feng Xi back to her room, he immediately rushed to the residence of the reincarnators, where a room full of people were waiting for him.

"What was the result?" Zhang Lang asked bluntly.

"It's a specially evolved explosion-proof structure!" Yue Xinyi said confidently.

"Through dissection, we found that the insect's internal structure was no different from before; only the exoskeleton had changed! We conducted experiments, and this new exoskeleton provides better protection against sudden impacts like explosions than the previous, thicker shell! However, its protective effect is worse against sustained attacks like swords and knives!"

"What's the principle behind this?" Zhang Lang asked, looking puzzled.

"It should be considered a simplified reactive armor!" The answer came from Wang Chufeng, a top student in materials science who squinted, clearly an expert in this field.

"The outer shell is made fragile, shattering upon impact to absorb a large amount of energy and protect the insect's body inside. There are similar real-world examples; modern car bumpers are mostly designed to be very flexible and easily deformable to absorb impact in a crash and protect the driver… However, this design is largely ineffective against melee weapons. For example, swords and arrows, because the attack area is small, the thin shell can't absorb much impact, and the insect has to rely on its strength to withstand it. In fact, because the inner shell is thinner, its defensive capabilities are even worse than before!"

"So it's easier to cut with a knife!" Zhang Lang frowned. "However, many bombs also contain caltrops, which are also sharp weapons when they explode. But according to my observation, the lethality of these shrapnel fragments has been reduced considerably. Why is that?"

"That's all thanks to the liquid layer inside!" Ye Peng added. "High-speed objects experience strong resistance in liquids, and the resistance increases exponentially with the speed. Shrapnel from an explosion is small in mass and fast in speed, making it very easy for the fluid to block it. In reality, bullets don't travel very far in water. Conversely, slower, slender, and heavy arrows retain velocity better, penetrate the liquid layer more easily, and don't lose too much energy."

"A liquid layer only a few centimeters thick, yet it has such a powerful defensive effect?" Liu Mofei looked at his armor. "Maybe next time I should attach a few more water balloons!"

"It's definitely not just the water layer that's blocking it!" Le Xinyi shook her head and said, "But the water layer does have a blocking effect. This light blue liquid has a very high density and is more viscous than water. When shrapnel enters, it slows down considerably. By the time it hits the inner armor, its lethality is greatly reduced, and it can no longer penetrate it..."

As she spoke, she looked at Zhang Lang:

"Moreover, these liquids condense into a thin shell upon contact with air. I estimate that while the insect is alive, its inner carapace will continue to secrete these liquids, so this defense system of a thin shell and liquid layer will continue to regenerate!"

"A remarkably sophisticated defense system!" Zhang Lang nodded. "I don't quite understand the specific principles, but generally speaking, it's designed to completely target the armor plates of gunpowder weapons, right?"

"That's right!"

Le Xinyi frowned:

"And that's exactly what I was worried about. This specialized defensive structure couldn't possibly be designed to protect against natural damage; it's entirely tailor-made to counter gunpowder weapons! This means these insects are evolving, and in just two days! An unprecedented weapon has appeared, and these insects have evolved a targeted defensive method in just two days! That speed is terrifying!"

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