Before revision:  Our results suggest that the disease propagation is highly related to population migration from Hubei resembling a L\'{e human mobility and thus could be controlled by efficient quarantines. Since quarantine is usually applied on a city level , more insight  can be obtained in analyzing the epidemic in cities.
After revision:  Our results suggest that the disease propagation is highly related to population migration from Hubei resembling a L\'{e human mobility and their scaling relations. Since strict quarantine has been usually applied between cities , more insight can be obtained in analyzing the epidemic in cities.