My bathroom leads to the celestial realm.

75. Technological innovation? This is a technological revolution!

A few days later, at the rented room.

"What the hell?" Xu Yan's voice suddenly rose two octaves. "My electromagnetic cannon is gone?"

Although he doesn't watch anime much, he has heard of Misaka Mikoto's name. As a fake Misaka Mikoto fan, how could he not have Railgun?

Li Er's cheek twitched, thinking to himself, "That cannon isn't even yours yet, why are you so excited?"

Zhang San spoke slowly and deliberately: "I'm sorry, this is still classified information. It's impossible to give it to an individual, not even to another world."

Xu Yan strongly disagreed, saying, "That's not right. The key to this thing is the power source, the control, and how to concentrate and release energy, not how complex its structure is, right?"

Zhang San had no choice but to nod and say, "Yes!"

Not only is it correct, it hits the nail on the head.

"That's it!" Xu Yan shrugged. "I didn't need that many anyway. Just get me a small-caliber cannon barrel, and I'll figure out the rest myself!"

Li Er remained silent, but Zhang San was incredibly curious: "Solve it? How?"

Although the electromagnetic railgun has been successfully tested, what would be the impact if another approach to solving the problem could be found?

It's something to look forward to.

"It's simple, just use thunder talismans!" Xu Yan chuckled, making no attempt to hide anything. "If one isn't enough, release five, ten, a hundred at once. Can we achieve the energy density needed to fire a cannon?"

Zhang San was stunned for a moment, then thought for a moment before saying, "This needs to be studied more carefully!"

He was technically savvy and immediately realized the immense value of the idea.

If the order and intensity of the lightning released by the jade talisman can be precisely controlled, achieving the launch conditions doesn't seem like something impossible!

This was truly an area he hadn't considered.

It has been tested before that the jade talisman can still release lightning even in the present world where spiritual energy is depleted, although the power is not great.

But as Xu Yan said, if there isn't enough energy, quantity will make up for it. Once the control problem is solved, all that's left is to use enough jade talismans to accumulate quantity.

This is truly a revolutionary new path!

In this way, the Jade Manual will transform from a mere consumable item from another world into a strategic resource!

At that moment, Li Er and Zhang San looked at Xu Yan with some suspicion: Did this kid plan this all along?

"Stop researching. Here's what I'll do: I won't make things difficult for you. Just give me a structural diagram of the cannon barrel, is that alright?" Xu Yan said.

"I have the diagrams, and I'll give you the cannon barrel too!" Zhang San agreed without hesitation. "The control module is fine too, but how to combine this with the thunder talisman is up to you."

Xu Yan, understanding the unspoken meaning, said, "Don't worry, as long as the experiment is successful, we'll definitely prepare a copy for our Special Security Bureau!"

He has some knowledge of electromagnetic railguns, but when it comes to the specifics, he's clueless.

Simply put, an electromagnetic railgun requires the capacitor bank to discharge continuously, orderly, and in stages, rather than all at once. This necessitates precise control over the discharge sequence of the capacitor bank.

Furthermore, the discharge interval must be properly controlled; otherwise, the thrust will turn into drag, the power will decrease, or it is not surprising that the engine will misfire.

So, while the two were ostensibly discussing resource exchange, what they were actually discussing was how to integrate cultivation and technology—two completely unrelated things—into a usable, easy-to-use, and practical whole!

The two reached an agreement and were in good spirits.

Xu Yan didn't think too deeply about it, but secretly planned in his mind whether there would be a surprise if he reforged a cannon barrel using weapon-refining techniques.

But after Zhang San pondered for a while, his expression suddenly changed, and the way he looked at Xu Yan changed, almost to the point of being stammering.

Xu Yan felt a chill run down his spine: "Hey, what's wrong with your eyes? I'm a man, I like women, don't you dare try anything with me!"

Li Er couldn't hold it in and burst out laughing.

Zhang San's face darkened: "My preference is also for women!"

Xu Yanzhen accused him indignantly: "Ask your second brother, isn't that look disgusting?"

Li Er looked at him reproachfully: "San'er, are you alright?"

"I'm fine!" Zhang San waved his hand, then suddenly asked out of the blue, "Brother Xu, Father Xu, Grandpa Xu..."

"Stop, stop right now!" Xu Yan felt uneasy after being yelled at. "And this is nothing?"

Li Er also found it strange: "San'er?"

Zhang San waved his hand again: "I'm fine, really fine, I just have something I want to ask."

Xu Yan quickly said, "Then ask properly, don't be so disgusting!"

"Alright, alright!" Zhang San readily agreed. "Brother Xu, please tell me the truth: can these thunder talismans be recharged like batteries?"

Li Er was stunned. How did the conversation turn to charging again?

Xu Yan said, "I've thought about it, but the essence of a thunder talisman is to use array talismans to convert spiritual energy into electricity. If we're talking about charging it..."

"Use array symbols to turn electricity into spiritual energy!" Zhang San blurted out.

"Yes, yes, that's right!" Xu Yan nodded repeatedly. "Hey, I didn't realize you were so quiet, but you're really smart."

Li Er said, "He's a tech guy, that's just his problem."

Xu Yan suddenly realized that it was no wonder.

Li Er nudged Zhang San again: "Wait, what are you trying to say after all this rambling?"

"Thunder talisman, I'm talking about thunder talisman!" Zhang San cried out in anguish, "Isn't the energy contained in a single thunder talisman comparable to that of a supercapacitor?"

Li Er and Xu Yan looked at each other, unable to answer.

"There should be more thunder runes, right?"

"That's right, there will definitely be more thunder talismans!" Zhang San's face flushed with excitement. "Once this thing is made, a power source weighing tens of tons can be simplified into an array plate composed of dozens or even hundreds of jade talismans! Do you understand? Do you understand?"

Li Er was stunned at first, then his expression changed drastically, and he stood up abruptly.

How much do a hundred jade talismans weigh? Even with the array plate, how large would it be?

If one person can't lift it, two people can definitely carry it away.

A single shipborne electromagnetic railgun requires a displacement of 200 to 300 tons.

But what if we change it to a thunder rune array? Would 50 tons be enough?

Moreover, by adding more lightning runes, the array plate has enough electrical energy reserves and can be used repeatedly!

If the Thunder Rune could be improved so that it could be recharged like a battery...

These days, it's not just electromagnetic guns that consume a lot of electricity; laser cannons are too.

There are also pump-free electric propulsion, electromagnetic catapults, all-electric ships... This isn't just technological innovation, it's a technological revolution!

Price? What price are you talking to me about? Is this about money? This is irreplaceable strategic value!

Just thinking about it made Li Er feel dizzy, as if he had just drunk half a jin of strong liquor.

Xu Yan finally understood. No wonder Zhang San was so agitated; the root of the problem was right there!

He was only thinking about how to reforge the cannon barrel, and hadn't really considered this direction. It was an unintended consequence.

Just as he was about to speak, he saw Li Er and Zhang San staring at him at the same time, their four eyes like four searchlights.

Xu Yan quickly stopped him: "Hey, don't look at me like that, it's no use asking me about this." He pointed to Master Cheng, who was lounging on the sofa playing on his phone, "My master is the real expert!"

Li Er and Zhang San immediately transformed into devoted fans, one massaging his shoulders and the other his legs, offering meticulous and thoughtful greetings.

Xu Yan's eye twitched, and he gave a thumbs up: "Ruthless!"

Master Cheng looked at this one, then at that one, his face full of confusion: "What's wrong?"