The project is located on the east bank of the Huangpu River in Shanghai with a cramped site. For releasing the ground floor space and maximizing the landscape, two independent office towers instead of one are designed to obtain more visual surfaces. The building is arranged from top to bottom according to a height limit of 50 meters. A structural mezzanine is set up, which is supported by an extending arm truss and suspended from above and below, so that all vertical forces are transmitted through the core tube to underground.