This design starts from the research of formal syntax, order and geometric relations, then creates a "solid and void" construct. Based on this construct, the "solid" is opened up more to provide more possibilities for space and sequential manipulation. The design addressed the integrity of inside and outside, architecture and landscape, form and function. This building serves as a bathhouse on the mountain. A "medium" space, which is considered as the core space of the building, is invented as an intermediation between "dry space" and "wet space". Through the manipulation of dimension, space reinforces space or contradicts its former one.