Yeah, it's a story of failed censorship and the truth coming out anyway, not successful censorship hiding the scale of the problem. That's impossible so long as China is on the Internet.
They cannot stop all of it, so things will definitely leak out. However, they can stop a giant majority of it, so while we still get the leaks, the magnitude of the prevented leaks is probably still significant enough that the censorship can be considered as "working".
Do not underestimate the Great Firewall. But anyways, from a manufacturing and distribution of basic essential health supplies, and more, China is probably best positioned to help save the world.