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A federal judge in Key West sentenced Zhao Qianli to the maximum sentence after pleading guilty on Tuesday to an indictment officer for photographing defense facilities.
Zhao's lawyer, Hongwei Shang, declined to comment on CNN when he was contacted by phone Wednesday night.
After clearing the main fence of the base, Zhao went directly into an area containing a series of satellite dishes and antennas called" the farm ", according to documents from the court.
Zhao took videos and multiple photographs of
"The fence line of the main facility contained several signs indicating that the farm area was a" RESTRICTIVE ZONE "and" KEEP IT " ", as well as a secondary fence line around the Farm,
Court documents do not clearly indicate whether Zhao was attempting to commit espionage.
A video of the US Navy describes the installation of Key West as "one of the world's leading intelligence fusion hubs."
The Navy monitors more than 1,000 suspicious targets a day, turning intelligence images into virtual reality programs.
The center monitors more than 42 million square kilometers of the Earth's surface to detect threats to US security, including drug shipments from the Americas, according to the video.
Employees of the five branches of the US Army as well as representatives of 13 other countries are working on the site.
The United States alleges a campaign of Chinese influence
The announcement of the condemnation of Zhao comes as US officials claim China is pursuing a persistent aggressive effort against US companies and government agencies.
Both countries have engaged in trade negotiations to alleviate the US longstanding concerns about Beijing's business practices. But for six months, tensions between the two countries are spreading in the military, political and diplomatic spheres.