In the 1980s, the prosperous human civilization ushered in an unprecedented disaster. The attack of extraterrestrial life has dealt a devastating blow to human civilization, so two generations of earthlings actively participated in this technological war. While browsing the universe, the protagonist encounters the earth civilization of the previous era and brings back advanced technology to save the earth from danger. And laid the foundation for the earth to begin to rise.
Purpose: Science and technology of the future