Pick up garbage in another world and bring it back to build infrastructure in the end times

When Sang Chu was killed by people from the same base in the end of the world, she accidentally boarded a strange train. When she woke up again, she was in another world! The train spirit told her that there was only one way to survive - work hard to make money! So - when someone asked if they could buy the scrap metal on her body. Sang Chu: Hesitating for a second is disrespectful to money! Monsters are valuable? Sang Chu: Go out of the city decisively to hunt monsters! I didn't awaken my superpowers in the end of the world, but I didn't expect to awaken in another world! However, the train actually forced people to return to the end of the world. But it doesn't matter, she has money now! Buy fruits, vegetables, and clean water! Hovering flying cars, optical computers, and high-tech items are all available...