The small insulated cup's power was actually far greater than my armor-piercing cannon with 150 damage. Its damage radius exceeded twenty meters!

Comparable to a 122mm heavy grenade cannon!

Ding Yi nodded, and naturally said:

"That's for sure, only hydrogen could have such a high energy density. You must know that the energy density of liquid hydrogen is more than three times that of gasoline in the same unit. Even for rocket launches, the engine uses liquid oxygen and liquid hydrogen as fuel, which also has the highest specific impulse among the three mainstream methods, representing the most efficiency."

"But as you just mentioned, even if a whole fuel tank is filled with liquid hydrogen, it can't sustain high-intensity combustion for more than ten hours, let alone it needs half of the space for storing liquid oxygen to aid combustion."

"Otherwise, where would the sixth underground level get so much oxygen to serve as the oxidant for hydrogen combustion?"

Lin Feng nodded thoughtfully:

"So Bai Ye's spatial superpower can indeed compress space, or rather maintain the stability of expanded space?"

Ding Yi took a deep breath and affirmed:

"That's right! It's based on the principle of a thermos cup."

Lin Feng seemed to come to a realization, and the right hand holding the chopsticks subconsciously knocked on the table.

A bang was heard, and a shallow palm mark appeared on the iron tabletop, frightening Chen Shanshan and Ding Yi beside him.

In his hand, a pair of stainless steel chopsticks were also broken into two halves.

"Sorry, didn't control my strength."

A Tier One Late Stage Evolver possesses more than six tons of basic power, usually having to handle with care. If released at full force, it's akin to a human-shaped demolition machine, capable of shattering an ordinary concrete wall with a punch.

Lin Feng came out of his thoughts and immediately spoke the key point:

"Isn't it the vacuum layer in the thermos cup? The vacuum insulation layer meets the requirement of creating space you just mentioned, having no substance in it, serving as an energy carrier."

Ding Yi approved of Lin Feng's answer with a hum:

"Exactly, for Bai Ye, the thermos cup is a natural space expander. She can utilize the 100% vacuum layer inside the steel cylinder, where no substance exists and can completely isolate sound."

Lin Feng nodded again but then asked with some confusion:

"I know sound is a kind of energy, the problem is this only explains part of it, the other part requires high-density energy. How is it solved? Is this the truth of Bai Ye's spatial superpower?"

"Isn't the vacuum capable of isolating heat conduction, having no energy inside?"

"So Bai Ye's superpower can selectively increase the energy density in a vacuum environment, isn't that similar to Liu Qian's ability control superpower?"

Upon hearing this, Ding Yi shook his head:

"Who said vacuum has no energy? On the contrary, according to the scientific research progress of the Old Earth Era, it suggests a massive amount of energy exists in a vacuum, named as zero-point energy or vacuum energy."

"Stemming from quantum fluctuations at the microscopic level, microscopic particles continuously create and annihilate in a vacuum environment, releasing energy which is zero-point energy."

"Thus, Bai Ye's superpower very likely acts on this phenomenon, intercepting microscopic particles to create additional space."

"Also known as the expansion storage space you mentioned."

"Considering the working time of the flamethrower and the power of the thermos cup explosion, she must expand the space to at least five times its size."

"Meaning in any vacuum environment, under her superpower effect, five times or more space can be expanded."

Lin Feng's face changed slightly:

"So a thermos cup with a capacity of one liter is actually five liters of liquid hydrogen…"

Ding Yi's expression was grave:

"Wrong, at least half is liquid oxygen as the oxidant, ensuring explosion power. Explosion power is calculated by the explosion speed, and she likely controls the release rate of compressed space to adjust the explosive effect."

"This is evident from her entering the underground relic without needing a sealed battle armor to isolate environmental pollution. Around her, there exists a transparent space isolating inside from outside, which is the spatial superpower she releases."

"Moreover, she can remotely control the storage space she creates, like showing you the floating thermos cup."

"This leader of the Salvation Army has developed her spatial superpower to the extreme, far surpassing ordinary Evolvers."

"Liu Qian can currently only empower, whereas Bai Ye directly alters the surrounding environment."

"If we were to be enemies, we absolutely shouldn't engage in close combat, but maintain a distance of several hundred meters, attacking from afar."

With that, Ding Yi looked at Chen Shanshan beside him:

"Once you go down, your mission is to keep an eye on Bai Ye, preventing her from making a move on Lin Feng."

"With your perception superpower and blinding effect, although not very effective on Bai Ye, at least you can buy a few seconds of reaction time to cover Lin Feng's retreat."

"As long as you can keep the distance, with Lin Feng's firepower, you'll be invincible!"

Chen Shanshan nodded:

"Should I wear power armor, using the low-power mode to last ten hours? Its reaction speed and defense are better than battle armor."

The low-power mode of the armor only retains the operation of the breathing filter and combat assistance system, without power assistance, relying solely on the wearer to bear the armor's weight.

Lin Feng furrowed his brow slightly and shook his head:

"Don't worry, at least on the upper three floors, and before solving the Tier Three mutant, they still need my help; it's only after the military machine tool is moved out that they might turn hostile."

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