From the Start, I Maxed Out the Tech Tree and Crushed the Aliens

[Black Tech + Top Student + Power Fantasy + No Romance]

In 2022, a crimson planet appeared in the sky, and aliens launched a massive invasion of Earth.

Earth's civilization was wiped out, and humanity was annihilated.

But...

Xu Yang was reborn in 2020 and bound to a System, leading all of humanity to rapidly advance its technology.

[Obtained controlled nuclear fusion technology]

[Obtained a two-dimensional foil]

[Obtained a planet-destroying cannon]

…

When the aliens arrived, they discovered that Earth had already reached god-level civilization. They were no match at all and were slaughtered one-sidedly...