[Technology Disaster Interstellar] In 2050, the age of catastrophe, the sun was affected by the unknown, aging accelerated, and entered the era of red giants early, and humans were forced to survive underground! Just as humans survived by luck, helium flash burst out and the earth completely melted! Lu Yongchang was reborn in the university physics class twenty years ago and obtained the science and technology tree system! Controllable nuclear fusion, space planes, space elevators, energy weapons, anti-gravity technology, unified theory, curvature navigation technology, two-way foil preparation plan... Let's see how the protagonist leads humans to escape the genocide crisis,