“Following an FBI investigation this summer, more than 1,000 researchers who had hidden their affiliation with the Chinese military fled the United States, the Justice Department said Wednesday.”

https://www.washingtonpost.com/national-security/more-than-1000-visiting-researchers-affiliated-with-the-chinese-military-fled-the-united-states-this-summer-justice-department-says/2020/12/02/9c564dee-34e1-11eb-b59c-adb7153d10c2_story.html