"The Blockchain Global Summit hosted by BitKan, a company specializing in bitcoin trading and services, was set for Sept. 10 in Beijing, but it was postponed just a few days before it was set to kick off. The conference was then quickly rescheduled to begin Sept. 20 in Hong Kong.
Chinese authorities, including its central bank, early this month banned the new issuance of digital tokens to raise money for a project or company. China has displayed much greater mistrust of cryptocurrencies — computer-generated assets that aren't tied to government authority — than other countries.
BitKan responded to that ruling on "initial coin offerings" (ICOs) in explaining its decision to move the conference."
More info, here: https://www.cnbc.com/2017/09/18/cryptocurrencies-major-bitcoin-conference-flees-as-china-cracks-down.html