I was thinking - if I had this, what could I do with the personal records of a billion Chinese people?
And I must conclude - absolutely nothing. It's of no interest to me.
Now, I probably lack sufficient criminal imagination, but the point is stuff like this is hard to fence because there's a very small market of buyers. In an article I wrote for Routledge about the markets for stolen digital data (specifically movie and album releases) I suggested that the underlying problem is there's symbiosis between leakers and buyers.
If you want to do anything, target the buyers. There's less of them. Don't try to secure inherently insecure massively centralised systems (Blotto + Dolev Yeo problem) . Or chase leakers. Or blame users. Or fire the CIO. Find out who wants this stuff and take down the show from the demand-side.
But hold on! Guess who the buyers are. And guess what sincere will exists within "law enforcement" to tackle this sort of "cybercrime".