This project is a rooftop duplex demonstration penthouse unit project designed and decorated for Wheelock Real Estate Co., Ltd. The interior space is four bedrooms and two halls with rooftops, a total of 1489 square feet (indoor) + 1264 square feet (rooftop). The client requested the design theme is luxury the modern and modern style is integrated into each space, and the set object is a couple and a child. The design of the dining room is mainly focused on the wall, all using wood finishes, characteristic canvas, and characteristic marble wallpaper to make the whole space feel comfortable and luxurious. In the master room, in order to show the momentum of the master, wall paintings, wood finishes, lintel, champagne gold steel branches are used as the main materials. The daughter's room is used to show the theme of purity and girlhood, using white hand-painted lacquer writers' privates, and pink bark leather as the bedside wall. The son's room is for the theme of show style and youthful play. It uses wood finishes, white hand-painted lacquer writers, blue leather, and special wallpaper as bedside walls. The study showcases art and a cozy atmosphere, featuring characteristic straight-grain wallpaper for the walls, wood finishes, and champagne gold and steel branch writers' shelves and shelf shelves. In addition to the original jacuzzi on the rooftop, Primocasa uses more modern outdoor furniture styles as a backdrop to the colorful cushion to embellish a bit of color in the concrete jungle.