He looked at Fang Xu with some surprise: "Why are you thinking about it so complicatedly?"

Fang Xu: "..."

"Empty?! This, this..."

Fang Xu stared at Lü Yongchang, speechless.

"The emptiness I'm referring to doesn't mean a vacuum."

Seeing that Fang Xu remained silent, Lü Yongchang continued to explain, "It's more that..."

"It may just be a gas giant with a shell on its outside."

Fang Xu fell into deep thought.

Although Lü Yongchang's conclusion was somewhat simplistic and crude.

But upon closer reflection, it seems that the possibility is actually quite significant.

A technological creation larger than Jupiter, yet with a mass less than five times that of Jupiter—its average density is far too low.

Jupiter's average density is only 1.326 g/cm3!

In terms of density, this technological creation is even less than that of the Earth.

This is clearly impossible.

"Then what is their purpose in building this planetary fortress?" Fang Xu asked subconsciously. "Could it be that this advanced civilization plans to take this gas giant planet with them?"

Lu Yongchang's eyes lit up.

"Don't tell me, you really shouldn't tell me!"

"That's actually quite possible!"

Fang Xu looked at him with a hint of helplessness.

"Are you crazy...?"

Fang Xu muttered to himself:

“Gas giants exist everywhere. Does a civilization with such advanced technology really need to care about a single gas giant…”

“What if, I mean, what if…” A mysterious smile appeared on Lü Yongchang’s lips, “that this gas giant is the home planet of some civilization?”

Fang Xu's expression froze, and he fell silent.