dongqi Architects designed the Estée Lauder Companies pavilion at the China International Import Expo (CIIE) 2019,which allowed the visitors to experience Estée Lauder Companies’ corporate culture, 13 classic brands operating in China, and new brands that would soon make their debut in China. The pavilion had a total area of 420 square meters and a height of 6 meters and used about 2000 5500mm-long acrylic columns with see-through clarity to create a “crystal pavilion”. Mrs. Estée Lauder believes that every woman can be beautiful, and dongqi materialized her interpretation of beauty as a crystal pavilion as much as possible. The pavilion took the shape of a simple transparent cube that consists of acrylic columns, whose positions had been carefully arranged using an algorithm to enable varied refraction at different angles. In this way, the pavilion remained visible to the outside, yet was still inviting with the dreamy atmosphere created by the fantastic optical illusions that filled every super-narrow vertical space between acrylic columns ,thus illustrating the Estée Lauder Companies tonality while attracting visitors. A seemingly simple cube on the outside, the pavilion had an organic and freeform interior layout. Estée Lauder Companies’ corporate culture and classic brands were displayed in tangent cylindrical units with different radii, while the general narrative remained coherent. In order to highlight the diversity of brands and products, different materials were used in different brand areas to create a unique atmosphere. Aside from the cylindrical units, dongqi arranged other areas enclosed by the cylinders and external walls for new brands, functional areas such as those for seating, M.E.P and storage. Despite the free flow of space arrangement, the narrative was still coherent, so that a visitor’s path was maximized without missing any scene. The pavilion must be freestanding and demountable, and the prefabricated components would be delivered into the building and assembled on site. To achieve the best transparency, dongqi and structural engineers had carefully designed an innovative steel/acrylic mixed fin walls, which perfectly merged the robust structure into the acrylic columns. All the acrylic columns were supported by a steel structure system, and most obstacle elements were set at the top and bottom of the pavilion, leaving a 5500mm vertical space above the ground almost visual-transparent for visitor engagements. The steel structure in the vertical direction was close to the acrylic columns in size and was coated in mirror-finish stainless steel. The fin steel columns were also orientated to different algorithm-generated angles in plan to avoid the global buckling along the weak axis of a single fin column, and they were integrated into the gradient sequence of the acrylic columns. The steel roof beams, also mirror-coated, were of reversed T cross-sections, and were wrapped with acrylic columns that extended upward, which kept the horizontal steel structure on top stable while integrating the steel and acrylic to the great extent possible.