The artefacts would have been in the lab in China. The day to day activities too. People behind an iron curtain are not free to talk freely and are unlikely to speak or share compromising information via public or open channels.
I think they want to investigate and that means more than just asking for reports.
That conclusion was tenuous at best. I think I know what you are referring to and it was discussed on here. One basis for their position was that the SARS Cov II virus would be an unlikely candidate for targeted experimentation which means that they wouldn't have wasted resources doing it in the first place. They also mentioned "no proof of" as being the reason why the virus was natural. You are quoting the conclusion without being aware of the reasons for that conclusion methinks.
Again, the reason for studying wuhan is not because they had the first case (because we don't know when that happened), it is because wuhan had the first mass cluster while also having the lab and the GOF studies. these factors mean that wuhan should be first in line to kick-off a study. It is (as they say) a prime candidate.
This is a good explanation, thank you. In the meantime, I think who should investigate other countries while they're at it to not waste time.