Pushing the Universe with the System

When Hu Xia was 27 years old, the earth was directly suppressed by aliens. There was a huge technological gap. Even the nuclear weapons that mankind was proud of were directly shot into a cloud of ash by unknown weapons when they were launched. From then on, humans began to live in captivity Unexpectedly, Hu Xia returned to high school class, and the learning aid implanted in her brain turned into a system. Change the tragic fate of mankind