China Resources International Office Accelerator not only carries the office acceleration function of helping small and medium-sized enterprises, but also meets the demand of road show and government service in the international ocean intelligence area. The special building shape creates an 18-degree Angle between the axis network of the original building and the building's edge contour, as well as an 18-degree Angle between the glass curtain wall of the first floor and the ground. This condition has a great impact on the compact functional layout of the interior, and creates opportunities for the design of more abundant space. The entrance hall of the first floor of the accelerator is about 200 square meters, which needs to meet the four functions of road show, government service, elevator waiting and reception at the same time, without interfering with each other. This design makes full use of the clear height of the interior building of 6.5 meters, and forms an N-shaped space between the road show hall and the government office area. The N-shaped facade also synchronously eliminates the irregular structural columns in the space.