After confirming that life on Ross 2 was still in its most primitive state and posed little threat to humanity, Lü Yongchang immediately ordered the city construction project to begin.
Once he had completed the planning work, he boarded the Black Lady Two again.
Before Central City was finished, he needed to return to the [Earth] to continue his research.
During the flight, Lü Yongchang sat in his chair and slowly closed his eyes.
His consciousness entered the familiar fluorescent-green space.
Against the fluorescent-green background, the tree diagram outlined in brilliant white stood out with striking clarity.
The basic framework of the level two civilization technology tree appeared before him.
This meant that, under Lü Yongchang's leadership, Human Civilization had mastered the major technologies of a level two civilization within sixty years.
Next came the work of "filling in" the technology tree's various "branches."
With all the core technologies unlocked, this work was not particularly difficult, but it was extremely tedious.
For instance, miniaturizing Type II Laser Weapons, miniaturizing ternary Photon Computers, adapting them for civilian use...
As for why he had to do such thankless work...
Lü Yongchang sighed inwardly and looked up at the top of the technology tree.
As before, a faint, barely discernible node sat at the top of the level two civilization technology tree.
Judging by his past experience, this technology should be the gateway to becoming a level three civilization.
Unlike before, however, this node was shrouded in thick fog.
No matter what angle Lü Yongchang viewed it from, he could not make out its contents.
At first, Lü Yongchang had not understood what was going on.
Only after he tried filling in the technology tree's "branches" did he realize what the fog was for.
Each time he completed a branch technology, the fog