(A–D) Model fitting and real-world data comparison. Panels (A–D) were the verification results of model parameters inputting, compared existing symptomatic cases, existing suspected cases, existing asymptomatic cases, and cumulative recovered individual datasets, from July 21, 2021 to August 30, 2021 based on the National Health Commission of China reports. Additionally, dotted lines were the 95%CI of prediction results, solid lines were the prediction results by model inputting, and original points were the statistical data from the National Health Commission of China reports. Moreover, the RMSE of (A) is equal to 194.35; the RMSE of (B) is equal to 6733.59; the RMSE of (C) is equal to 46.54; and the RMSE of (D) is equal to 283.57.