Global High Temperature, I Build the Top Survival Fortress

[Natural disaster type doomsday + black technology + cool writing + not the Holy Mother + technical nerd + no powers + no system] Xue Cheng, who was born into a wealthy family, originally had everything that his peers would envy. He came from a well-off family and graduated from a top university. He was hired by the Chinese Academy of Sciences and became a top scientist after graduation. However, just two years later, he was expelled from the Chinese Academy of Sciences and voluntarily gave up his inheritance rights. He sold his property and became a shame for the family and was kicked out of the Xue family. Just because the cosmic electrical signals were captured through radio telescopes, we learned that the sun will soon expand into a red giant, and its brightness will increase 2,000 times. At that time, the earth will be pushed out of its current orbit and become a purgatory on earth. Xue Cheng, who knew the truth, mobilized all resources in advance to build a fusion reactor and build a doomsday fortress! Vow to be the ultimate witness of human civilization reaching its end!