Fig. 1.
Download rank of iPhone application in China: Facebook, Twitter, and Wikipedia. Data are from App Annie. Top intentionally omits the name of the VPN app and its precise ranking.
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.