Silo-top office is the transformation of the 33-metre-high top floor of a 1960s’ silo building in Guangzhou's oldest beer factory to O-office's studio space. The factory locates in the north of old Guangzhou downtown, and the silo building is just next to a main branch of Pearl River, the mother river of the city.The basic concept for this reconversion project is to adapt the originally enclosed machinery space to an open spatial system, by inserting a sequence of light-structure work and life installations of the architects’ team, while preserving the existing built envelope intact.