China, as usual, shuts down and bans everything, there are only gov projects left that focused on blockade and new technologies. That's very good that all prohibitions have occurred slowly and haven't exerted strong pressure on the market. If there were a dramatic ban at the time when 90% of all cryptocurrency trades were passing through China, the price would probably fall to $500.
I'd wait for more information before jumping to that conclusion. Police don't swoop down if there isn't a public report lodged. With all due respect to these conferences, I'd say that organisers have a bad reputation for managing participants. It's all fee-based anyway, so there's no incentive to screen participants. I mean, how many ponzis masked as cryptos have already made big stage appearances? Remember OneCoin and their Forbes cover?
News says suspicion of fraudulent ICO in the midst. Won't be surprised if these wolves are prowling these conferences for networking opportunities. There's already a pattern of corporate scams ala Madoff in Southeast Asia now.