Before revision:  Since quarantine is usually applied on a city level , more insight  can be obtained in analyzing the epidemic in cities. Our results suggest that the disease spread in a city in China is characterized by  two-stages process.
After revision:  Since quarantine is usually applied on a city level , more insight can be obtained in analyzing the epidemic within cities, especially the time evolution of the infection, death, and recovery rates which affected by policies. We study and compare the infection rate in different cities in China and provinces in Italy and find that the disease spread is characterized by two-stages process.