Recent frequent extreme natural disasters and major public health crises have intensified the convergence of traditional and emerging risks, significantly threatening urban public safety. To address the knowledge gap regarding non-traditional risks, a city-level "risk-resilience capacity" assessment framework under the holistic national security paradigm was developed. The results are as follows. Nanjing demonstrates superior economic development capacity, whereas Hangzhou underperforms. Hangzhou leads in social security capacity, contrasting with Dongguan's deficiencies. Dongguan exhibits the strongest ecological resilience, while Nanjing ranks lowest. The analysis identifies GDP-driven economic capacity and social security expenditure as critical resilience determinants.