  There were 27 novel coronavirus pneumonia cases found in Wuhan, China in
December 2019, named as 2019-nCoV temporarily and COVID-19 formally by WHO on
11 February, 2020. In December 2019 and January 2020, COVID-19 has spread in
large scale among the population, which brought terrible disaster to the life
and property of the Chinese people. In this paper, we will first analyze the
feature and pattern of the virus transmission, and discuss the key impact
factors and uncontrollable factors of epidemic transmission based on public
data. Then the virus transmission can be modelled and used for the inflexion
and extinction period of epidemic development so as to provide theoretical
support for the Chinese government in the decision-making of epidemic
prevention and recovery of economic production. Further, this paper
demonstrates the effectiveness of the prevention methods taken by the Chinese
government such as multi-level administrative region isolation. It is of great
importance and practical significance for the world to deal with public health
emergencies.

Populations and Evolution;Physics and Society