The direction it extends is clearly the "ceiling" that symbolizes a first-class civilization!

He subconsciously held his breath and silently watched the dotted line slowly extend in the fluorescent green space!

breakthrough!

The moment the dotted line broke through the ceiling of a first-level civilization, he felt a loud boom in his mind!

His face flushed red, and he breathed rapidly as he looked up at the very top of the technology tree system, trying to gaze upon the so-called Level 2 civilization technology!

The technology tree interface slowly moved upwards.

Several icons, so dim they were almost invisible, appeared in front of him.

[Initial Mastery of Energy Weapons]

Photonic computing technology

[...]

The moment he saw those dim cursors, his heart rate skyrocketed!

really!

He guessed right!

The emergence of photonic control technology signifies a fundamental technological breakthrough in photonic computers!

The photon computer, which originally seemed to have no use, became the basic technology of a Level 2 civilization!

...

"professor?"

"professor?!"

A faint call came from above.

Lu Yongchang's eyes flickered slightly, and he quickly manipulated his consciousness to exit the technology tree system.

The moment consciousness returned to the body, a slight pushing sensation came from the shoulder.

He slowly opened his eyes.

Su Yutong pushed his shoulder anxiously.

"Professor Lü?" Seeing Lü Yongchang open his eyes, Su Yutong breathed a sigh of relief. "You're finally awake."

"I thought..."

At this point, Su Yutong quickly stopped talking, looking at him with a worried expression: "Professor, are you alright?"

"How about... we go see Dr. Wen again?"