Geological storage of CO₂ (known as geological sequestration) is increasingly seen as a viable strategy to reduce the release of greenhouse gases into the atmosphere. China has become one of the largest emitters of CO₂ in the world. Therefore, alongside other emissions reductions measures, the deployment of geological storage projects to capture CO₂ in China is essential. This paper focuses on the establishment of qualitative and quantitative assessment methods for site-scale suitability of CO₂ geological storage in deep saline formation systems. This is based on numerical modelling prior to the development a specific geological storage project, providing a more accurate selection of preferential sites from a list of potential storage locations. However, the detailed design of specific geological storage projects was not considered.