In the exhibition hall, the soil used to construct cave dwellings is selected as the core element. In the first half of the exhibition hall, soil manifests its natural traits. While in the second half, after becoming rational and restrained with the assistance of science and technology, soil is reborn as the S & T soil to construct passive houses. The exhibition hall translates the abstract and professional concept of passive houses into an interesting, visualized and easy-to-understand scientific essay, and transforms the sales office from a seller to a sharer of beautiful life knowledge.