In the post-industrial society, increasing number of events are staging in public spaces and public spaces around the globe are much more frequently occupied by planned city events rather than unplanned city life. The expansion of public space eventization has drawn great scholarly attention. However, in the exiting literature, there still lacks a complete and quantitative assessment on how events affect public spaces. Besides, empirical studies on public space eventization in China and its consequences can hardly be found. Therefore, the paper, through using the methodology of "publicness" and conducting fieldwork in Northern Longfu Cultural Park in Beijing, evaluates to what degrees that events staged in public spaces in China affect the public life and analyses how public space eventization impact the publicness of Chinese urban space. The findings indicate that, though the overall publicness score did not variate significantly when staging event, the event, through multiple component processes such as disintegrating with the city, creating filtered space, providing cultural consumption amenities and introducing communities of strangers, affected the public space on specific dimensions or aspects. Public eventization process cannot be reduced into a unidirectional process through which public spaces are simply animated or altered detrimentally by events.

The older neighborhoods in Chinese cities are the main areas in which the elderly live. Both housing and the older adults have experienced the resonance process of co-growth and co-aging. Along with the acceleration of the aging population, the older neighborhoods with the aging physical space environment are increasingly unable to meet the needs of the elderly, which affects their health and well-being. Although the Chinese government has launched a program of retrofitting older neighborhoods to make them more hospitable for older residents through, for example, elevator installation and infrastructure improvement, these practices are merely associated with various neighborhood features. Most existing research starts from small-scale case studies and consequently lacks macro-level analysis of the characteristics of the physical spaces and aging population in older neighborhoods. Therefore, this paper selects old neighborhoods constructed from 1949–1999 in the central city of Beijing (within the Fifth Ring Road) as research subjects. The research begins with an analysis of the construction and evolution of the standards of selected older neighborhoods in Beijing and establishes measurement metrics for the spatial characteristics of both the neighborhood and aging population. This article concludes that older neighborhoods in central Beijing can be classified into seven clusters based on their spatial characteristics and three clusters based on aging population characteristics through K-means classification. Additionally, this paper conducts an overlay analysis of these two classification results to identify different spatial features of older neighborhoods within varying characteristics of the aging population and proposes suggestions for the renovation of selected old neighborhoods. The study aims to provide a reference for retrofitting older neighborhoods with the goal of creating an aging-friendly community, and to supply a scientific basis for empirical research on the middle scale and micro scale.