I view China's response as predictable whether it was a lab leak or not. I doubt initially they would have known internally. They had something mysterious spreading rapidly, so they shut cities down trying to corral it, and of course "managed" the news, as they always do. Even the possibility of a lab leak would need to be suppressed.
If they now KNOW it was not a lab leak they'd still be not wanting to discuss the matter.
And stipulating for the moment it likely did originate in that lab, then the question is whether it was an intentional leak or accidental, and whether the lab modified a virus with intent to spread it or just had one of their modifications leak out. As I've said, I think it is POSSIBLE it was zoonotic. I don't think we'll ever know with high certainty it's origins other than starting in China.
And I'm not sure it matters IFF it was accidental.