The extension part of the installation is to provide a guide for the moving line of customers. From the different car model areas in the exhibition hall to the two-layer complex multi-functional spaces including lifestyle area, merch retail area, leisure area, tea room and café area, they are derived from and connected together by the triangular unit, which also integrates display, sales, customer experience and after-sales service at the same time. The steel structure of the unit can be recycled in the future.