Before revision:  The infection peak time of the epidemic in Wuhan was January 29, not February 11 estimated by reported cases, and the infection peak time of the epidemic in Hubei (except Wuhan) was February 2, not February 4 estimated by reported cases. (2) The estimated infection time interval of the reported cases is smaller than the actual interval.
After revision:  The infection peak time of the epidemic in Wuhan was January 29, not February 11 estimated by reported cases, and the estimated infection time interval of the reported cases is smaller than the actual interval.