"Three Cities" refers to a concept often used in urban studies to describe the distinct social, economic, and cultural characteristics of different areas within a metropolitan region. These cities can represent various aspects of urban life, such as wealth, poverty, and diversity, highlighting the contrasts that exist within a single location. In many cases, "Three Cities" can illustrate the disparities in access to resources, education, and opportunities among different neighborhoods. This framework helps researchers and policymakers understand the complexities of urban environments and address issues like inequality and urban planning, ultimately aiming for more equitable development across the city.