MAD Tops Out on Beijing's Chaoyang Park Plaza . . MAD Architects has topped out on Chaoyang Park Plaza, a 120-meter-high mixed use development rising in the central business district (CBD) of Beijing on the southern edge of Chaoyang Park, one of the city's largest parks. A product of Ma Yansong’s “Shanshui City” concept, which aims reintroduce nature into the urban realm, the building is designed to "push the boundary of the urbanization process in modern cosmopolitan life by creating a dialogue between artificial scenery and natural landscapes." .