For Type III cities (young cities, ageing slowly), where the demographic change will have an impact further in the future, indicators will be narrower in scope and their implementation may increase as demographic change progresses. The WHO (2009) defines an age-friendly city as “an inclusive and accessible community environment that optimises opportunities for health, participation and security, to ensure quality of life and dignity as people age”. To understand how age-friendly a city is and to compare it internationally, indicators can help explore the effect of the relevant policies after they are implemented.