Before revision:  Similarity analysis shows that two strains of the COVID-19 virus taking rhinolophine as host have very high similarities with the COVID-19 virus taking human as host, although the average similarity between the strains of the virus taking pangolin as host and taking human as host is higher. Evolutionary relationship analysis shows that about 13 strains of the COVID-19 virus sequenced in 5 countriesare very likely to be connected to or can potentially lead researchers to find the first generation COVID-19 virus and its origin .
After revision:  Similarity analysis shows that two strains of the COVID-19 virus taking rhinolophine as host have very high similarities with the COVID-19 shares little similarity with the flu-causing coronaviruses and the other P3/P4 viruses. Strikingly, we observed divergence of COVID-19 virus sequenced in 5 countriesare very likely to be connected to or can potentially lead researchers to find the first generation COVID-19 virus and its origin .