I imagine telling an American that they are not allowed to hunt wildlife and sell it at market, and I don't think that would work. I wonder if China really has a much greater ability to enforce such a provision?
That seems out of our control, but I wonder what would be? Would preparations include mask stockpiles, and can we force people to wear them? It seems that mRNA vaccines can be created quickly, but can we mandate that people get them?
The ability to appeal to their self-interest? I doubt that any evidence would cause the CCP to deviate from its preferred story (which I think now is natural zoonosis outside China, then import on frozen food?), but they don't want a pandemic any more than I do.
So I'd guess that given evidence that certain research activities likely caused this pandemic, the Chinese government would quietly act to restrict them, all while publicly denying that they're doing so. Indeed, they might have already--Dr. Shi's group hasn't published anything even as dangerous as these BU researchers' experiment since before the pandemic.
As noted above, I believe that subpoenas should be obtained for all relevant records of the WIV's collaborators, and for any sequencer reads that potentially contain early viral genomes as contamination. The evidence for a lab origin so far is scattered and circumstantial, but that's just from various leaks and amateur open source intelligence; perhaps a formal investigation with subpoena power could learn more.
It does not seem that we've been able to contain the ambitions of North Korea, and Iran isn't looking so good either.
The DEFUSE proposal was described in this Intercept article:
https://theintercept.com/2021/09/23/coronavirus-research-gra...
For the previous two coronaviruses that emerged in humans (SARS-1 and MERS), animal hosts (civet cats and camels) were found within about a year. That's pretty good evidence of natural origin. For SARS-CoV-2, no such animal has yet been found, excluding animals known to be infected by humans like housecats or mink. That's not proof of unnatural origin--for example, Ebola is unquestionably natural but its zoonotic hosts remain mysterious. That's not what anyone expected, though.
For overall background, Alina Chan has a book. I haven't read it myself, but I've found her comments elsewhere to be cautious and reasonable.