https://www.sfgate.com/news/world/article/US-Gov-employee-in-China-reported-strange-12936495.php
BREAKING
BEIJING (AP) — A U.S. government employee in southern China reported abnormal sensations of sound and pressure, the State Department said Wednesday, recalling similar experiences among American diplomats in Cuba who later fell ill.
In an emailed notice to American citizens in China, the department it wasn't currently known what caused the symptoms in the city of Guangzhou, where an American consulate is located.
"A U.S. government employee in China recently reported subtle and vague, but abnormal, sensations of sound and pressure," the notice said. "The U.S. government is taking these reports seriously and has informed its official staff in China of this event."
The department said it wasn't aware of any similar situations in China, either within the diplomatic community or among others. It didn't further identify the person with the symptoms or say when they had been detected.