Wikipedia says they failed a safety inspection for breaches of containment. What were they failing to contain and what was the effect of the breach?
I mean, the argument of the comment at the top of this thread seems pretty straightforward to me: if it's a norm to explain what's going on at biological research labs with links to the military, then that norm applies to everyone, not just China. The world deserves to have a detailed and open accounting of what went on, even if the accounting is "Nothing relevant." And in a practical sense, if the US abides by the norm that public reports on military bio-warfare labs are expected, it gives the US a much better bargaining position when asking other people to abide by that norm.
They failed an inspection and mishandled waste byproducts - but also after an "unknown" pneumonia-like respiratory disease starting spreading in the area around D.C