Found ancient warships at the beginning

The doomsday war thousands of years ago destroyed human civilization and the surface ecology. Human beings can only live in shelters on the cliff and continue the flames of civilization< Br> however, over the past thousands of years, humans on the cliff have gradually derived a new way of life and social model. People have gradually migrated to the sky by using the technology before the end of the day, and set their homes on the highly toxic clouds full of radiation< Br> these people who sail above the sea of clouds in floating boats call themselves people in the clouds.