Chinese should never have had a level 4 facility.  Study their pharmaceutical industry and it’s filled with them cutting corners, intentionally fudging results, using inferior ingredients, paying bribes and general corruption to the end result of many Chinese drugs aren’t suitable for humans.  Look up the world wide shortage of quality penicillin for a comparable story.  Wouldn’t be surprised if the janitor was selling dead research animals to the market out of the biohazard dumpster...