To make a systematic trade-off between energy density, rate performance, cycle life, safety and cost, relying on the Nayuan team's in-depth research on sodium ion cathode materials, key indicators are deduced from the application scenarios. Through the precise matching of material use, electrode structure and process parameters, while ensuring the safety margin, the system advantages are maximized, shortcomings are avoided, and the high stability of the cell performance is maintained, and the theoretical "possibility" is transformed into a mass-produced product.