I remember an article from about a decade ago where a virologist was saying that China shouldn't be trusted with the highest danger (lvl 4?) labs (IIRC at the time when Westerners were about to or starting to help them build them) because Western labs themselves could barely (or not) be trusted with something as dangerous, and (s)he expected the Chinese to not be able and/or not be willing to fully respect the procedures involved.
This article suggests that lvl2 protocols were indeed used for lvl4 biohazards.