Core Viewpoint - The transformation of the "fifth facade" from an "idle space" to a "vibrant node" is enhancing urban livability and creating new consumption scenarios in cities like Chongqing [1][10]. Group 1: Definition and Importance - The "fifth facade" refers to the rooftops and terraces of buildings, which significantly influence the overall architectural aesthetics from a bird's-eye view [2]. - Cities are shifting from large-scale expansion to improving existing spaces, making the revitalization of the "fifth facade" a key strategy for urban development [2]. Group 2: Examples of Utilization - The newly opened rooftop tennis court at the Liangjiang Software Park attracted over 40 employees from more than ten companies on its first day, showcasing the potential of rooftop spaces for recreational activities [3]. - In the C33 Liangjiang Cultural and Creative Park, a "cloud arena" is popular among young people for trendy sports like frisbee and rugby, indicating a growing trend of utilizing rooftops for diverse activities [6]. Group 3: Economic and Social Benefits - Rooftops are becoming new growth points for diverse consumption scenarios, with examples including rooftop swimming parties in Shanghai and community spaces in Shenzhen that enhance neighborhood connections [7]. - The Chongqing Huazhao Industrial Park is utilizing its 47,000 square meters of rooftop space for a distributed photovoltaic power station, generating an average of 13,000 kWh daily, contributing to green energy and cost savings for businesses [8]. Group 4: Aesthetic and Cultural Value - The N.98 Digital Innovation Park has transformed its rooftop into a semi-open office space with ample natural light, enhancing the overall aesthetic and functionality of the area [9]. - The Two Rivers Beiling Museum features a rooftop terrace with historical artifacts, creating a cultural landmark that attracts visitors and enhances the urban experience [13]. Group 5: Future Directions - The development of the "fifth facade" is seen as a response to urban renewal needs, combining aesthetic, cultural, and economic values, and is expected to continue evolving as cities seek to enhance livability [10].