Figure 1.
Distribution of the study site in Guangxi, China. The five cities located in border and non-border of Guangxi, which belongs to the southwest region of China.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.