The FBI assesses that, at some point following the search and interview of Tang on June 20, 2020, Tang went to the Chinese consulate in San Francisco, where the FBI assesses she has remained, prosecutors wrote in a July 20 court filing that seeks the detention of another Chinese scientist who the Justice Department says lied about his military background to get into the US
The allegation comes amid rising tension between the US and China, particularly related to theft of intellectual property including by Chinese researchers with connections to the military and government for Beijing's benefit.
Just this week, the US ordered the closure of the Chinese consulate in Houston, and the Justice Department charged two Chinese hackers with targeting firms working on vaccines for the coronavirus.