They need to get out of country first to apply for academic position. I would not be surprised that anyone with first hand knowledge (and their close relatives)

They need to get out of country first to apply for academic position. I would not be surprised that anyone with first hand knowledge (and their close relatives) is already under 24/7 surveillance with limited mobility and strictly controlled Internet access. Are you not surprised that there are no interviews with employees at facility? If they somehow escape from country (very unlikely) China government may threaten/disappear/imprison/kill their relatives in the country. China can also take hint from Russia and kill them abroad. Stakes for leaker are much much higher than short prison sentence like in west. Besides no major western university will touch this person - there are consequence for crossing China. (from protest from Chinese students to economic consequences).