This is interesting, and would serious upset the PRC

This part is terrifying:
According to Housley, FBI director Christopher Wray “didn’t know right away because they wanted to make sure they got all they needed before telling him.” In fact, Wray was “ambushed” with the information, according to Van Laar’s sources, as was the CIA. “Sources say DIA leadership kept the defector within their Clandestine Services network to prevent Langley and the State Department from accessing the person, whose existence was kept from other agencies because DIA leadership believes there are Chinese spies or sources inside the FBI, CIA, and several other federal agencies,” according to the report.

'Terrifying' because it's probably true.