(a) The fitting results of the confirmed cases and the solution of model (2.1). (b) The fitting results of the deathes and the solution of model (2.1). The red dots denote the cumulative documented cases and deathes of SARS-COV-2; the blue line denotes the solution of model (2.1); the grey areas represnt the 95% confidence interval (CI); the black circles represent the cumulative confirmed cases and deathes from April 1st to 13th.