Space buildings float in the air like clouds, where people can live and work. People already have personal spaceships, and they can walk through many space buildings. People can also take Airbus, which has become a remarkable new public transport mode by using its unique suspension technology. Trains fall from the sky like rainbows, come and go like comets, and cities are no longer congested by three-dimensional buildings and transportation networks. The green ecological park provides people with green food, and there is also a space building for people to walk in and out of the space like a leisurely stroll. The criss-crossing air passage is like a footbridge, which makes people ascend to the clouds.