Professor Dongdong's penthouse was built on top of Gaoge's bed. This is the only house in the entire Aoge village that has a floor heating switch. Gengu craftsmen used copper pipes and a set of water collectors to bring up hot spring water, and used the power of invisible servants and radiators throughout the floor and in the room to provide heat. for the attic. As the invisible servants worked, the room was warm; When they don't work, the room is not hot.