The concept of Villa Jian came from the local architectureword called “Jian”. In the local architecture culture, therewas one commonly used for building space base unit that is"Jian", one "Jian" represented a width of about 3.3 m to 3.6 mof spatial scale, this word "Jian” not only represented aspace base unit, but also strongly linked with the localtraditional form of construction. Before going further to thedevelopment of the design, the client‘s requirement was tobuild 11 “Jian”. Thus, there was a given condition of designinga big house with a double-slope roof covering 11 “jian”.According to the needs of the client, the building consistedof main two basic functions: office space and exhibitionspace, both of the functions were limited to a semi-openprivate property. The starting point was how to combine thesemi-open exhibition space with a semi-closed officespace under a single roof. The idea was finally to divideboth the exhibition and the office into two parts: publicexhibition and private exhibition, public office and privateoffice. Public exhibition and office space were placed in thefirst floor, and the private exhibition and private office wereplaced in the second floor. Therefore, the entrance wasdesigned to be a semi-open exhibition space, while theother side on the first floor was proposed to be the staffoffices. On the second floor, just opposite to the first floor,above the entrance of the first floor were a private parlorand a private office, and the other part was a private exhibitionhall. The entire function spaces have become anX-form in the section; the center position of the X hasbecome the hub of linking two functions and two stories.Here wide stair steps were designed for seating as wellwhere the semi-open exhibition space and the semi-closedoffice space have dramatically been intersected together.This stair hall, as a mixed space, had not only a circulationfunction but also a dual function for the exhibition performancesand the meeting space. Thus, a mixed spacesystem linking different regular functions was the coreconcept of the building.