Cataclysmic Era: I can unlock the tech tree

[Technology + Disaster + Interstellar + Tech Tree]
In 2050 AD, the sun will be affected by an unknown force, and a helium flash is about to occur!
Is the Earth on the brink of destruction?
It doesn't matter, I'll take action!
Is the Trisolaran civilization about to invade the Proxima Centauri system?
It doesn't matter, I'll take action!
In the dark universe, are advanced civilizations embroiled in conflict?
It doesn't matter, I'll take action!
……
Starting with controlled nuclear fusion, the protagonist, Lü Yongchang, ushers in the interstellar era of human civilization!
Spaceplanes, space elevators, energy weapons, antimatter production, the Grand Unified Theory, warp drive, two-dimensional debris (two-dimensional foil)...
Methane Ocean, Mysterious Species!
Liquid ammonia planet, physical fusion!!
Dimensional beings, a dimensional reduction attack!!!
What mysteries lie within the endless universe that are worth exploring?
How should human civilization conduct itself in the conflict between advanced civilizations?