Faced with Fang Xu's questioning, Lü Yongchang could only purse his lips slightly.

And that's after I've exaggerated!

If Fang Xu knew that he had spent an entire night drawing these blueprints, he'd probably be on the dissection table by now.

"It's just a blueprint for a reactor; it's still a long way from a complete controlled nuclear fusion reactor!"

Upon hearing Lü Yongchang's words, which were full of Versailles implications, Fang Xu's lips twitched twice.

In his 45 years of life, Lü Yongchang must have been the most pretentious person he had ever met.

But soon, he noticed something was amiss.

"etc!"

"This reactor..."

Fang Xu's voice made everyone's hearts clench.

Hong Qiming couldn't help but look at him.

Could it be... that there's something wrong with the reactor's blueprints?!

"This is not a tokamak device!"

Fang Xu exclaimed in surprise!

A slight smile appeared in Lü Yongchang's eyes.

As expected of Academician Fang, nothing could fool him!

"This is definitely not a tokamak device!"

"This is a stellarator."

Lu Yongchang chuckled and said, "If my calculations are correct, the controlled nuclear fusion time of ITER should be within 30 minutes, right?"

Fang Xu's eyes flickered slightly, and he nodded gently: "That's right, the latest experimental results show that the fusion reaction was maintained for about 26 minutes."

"Could it be..."

"Hehe..." Lü Yongchang chuckled softly, "If nothing unexpected happens, ITER will soon reach the ceiling of the tokamak device!"

Fang Xu's pupils suddenly contracted: "You mean... the tokamak device is not the optimal solution for achieving controlled nuclear fusion?!"

Lü Yongchang nodded in affirmation of Fang Xu's statement.

"How could that be... If that were true, wouldn't humanity have been on the wrong path for decades?!"

Fang Xu stood there dumbfounded, muttering to himself.

He found Lü Yongchang's statement somewhat unacceptable!

Lü Yongchang was well aware of Fang Xu's complex feelings at that moment.

In the past, in order to break the monopoly, all of Xia Kingdom's scientific research resources were invested in the development of the tokamak device!

However, no matter how hard we try, controlled nuclear fusion can not be sustained for more than thirty minutes!

At the time, this was a fatal blow to the confidence of all researchers!

If Fang Xu hadn't learned about the defects of the tokamak device by chance, Xia Guo would probably have gone down the wrong path to achieving controlled nuclear fusion!

"How...how can I verify what you're saying?!"

Fang Xu, as expected of the top scientist in Xia Country, quickly recovered after a brief moment of distraction and asked Lü Yongchang in a deep voice.

Lu Yongchang shrugged and said casually, "It's very simple. All you need to do is find a basic stellarator, build a reactor using the material I deduced, and then ignite nuclear fusion. That will naturally verify it."

Fang Xu's eyes flickered slightly.

He recalled that there was indeed an "outdated" stellarator device in the laboratory that he had bought at a high price before.

"etc!"

Hong Qiming's loud voice suddenly rang out from the side.

"Can someone explain to me what the stellarator and tokamak device mean?"

As he spoke, Hong Qiming turned his gaze toward Lü Yongchang.

Upon seeing this scene, Guan Hualiang and Fang Xu both took a step back and handed the stage over to Lü Yongchang.

After a moment of contemplation, Lü Yongchang said, "Minister Hong, you should know that controlled nuclear fusion requires a strong magnetic field to confine the fusion materials, right?"

Seeing Hong Qiming nod, Lü Yongchang breathed a slight sigh of relief.

That makes sense!

Otherwise... he would need to explain the principles of controlled nuclear fusion from the beginning!

Although it's something that can be resolved in a few words, it's still a bit troublesome!

"Simply put, the toroidal spiral magnetic cage of a tokamak device requires plasma current to generate, while a stellarator does not; it can generate a twisted toroidal magnetic cage directly through an external coil."

"Then... what's the difference between these two? Aren't they both capable of generating magnetic fields?"

A look of confusion appeared in Hong Qiming's eyes.

"Smack!"

Lü Yongchang snapped his fingers lightly.

"That's the main point I wanted to make!"

“In a tokamak device, the plasma current can reach tens of millions of amperes. Such a huge current will inevitably bring countless problems.”

"For example, twisted modes, magnetic surface tearing, magnetic island formation, etc."

"All of this will reduce people's ability to contain plasma."

"The consequences could range from a minor fire going out to a major explosion!"

As he spoke, Lü Yongchang made an explosion gesture.

Hong Qiming nodded, seemingly understanding but not quite.

Although he didn't understand the various technical terms Lu Yongchang used, he understood the last sentence.

What if the tokamak device explodes?!

Hong Qiming looked at Academician Fang Xu standing next to him with a complicated expression.

Faced with Hong Qiming's gaze, Fang Xu could only nod helplessly and say, "It is possible, but... so far, the tokamak device has never experienced such a serious malfunction!"

"Not now, but what about later?" Lü Yongchang said calmly. "Once the fusion sustaining time is increased to 30 minutes, serious consequences might occur!"

Fang Xu froze abruptly, exclaiming in shock, "You mean, the tokamak device will explode thirty minutes after the fusion begins?!"

Lu Yongchang nodded with a complicated expression: "That's right, this is also the biggest trap of the Tokamak device."

"Although the poloidal magnetic field generated by the plasma current makes the structure of the magnetic cage very simple, the high temperature and ultra-high current will eventually lead to some unexpected events."

Fang Xu suddenly realized: "So that's how it is! So that's how it is!!"

"What about the stellarator?" Hong Qiming swallowed hard and asked in a low voice.

He suddenly had a feeling that this young-looking sophomore in front of him was just like an old professor who had been immersed in this field for decades!

Even Fang Xu was like a student in his presence!

Upon hearing Hong Qiming's question, Lü Yongchang casually replied, "The stellarator is simple. All you need to do is create a closed, twisted, ring-shaped magnetic cage inside using external coils!"

Hong Qiming: "???"

"That's so simple? Then why didn't we use stellarators before?!"

Fang Xu glanced at Lü Yongchang with annoyance and explained again, "The difficulty of the stellarator lies in the manufacture of the external coils."

"First of all, the outer coil has an irregular shape, which is a major challenge in manufacturing."

"On the other hand, to generate a sufficiently strong magnetic field, the coil material should ideally be a superconducting coil, which further increases the difficulty."

"After all, room-temperature superconductivity technology has not yet been mastered."

Lu Yongchang's soft voice came from the side: "What if I could solve the problem of room-temperature superconducting materials?"