Two of China's Biggest Exchanges Stop Bitcoin Withdrawals - CoinDesk
http://www.coindesk.com/two-chinas-biggest-exchanges-stop-bitcoin-withdrawals/
China Central Bank Said to Call Bitcoin Exchanges for Talks - Bloomberg
https://www.bloomberg.com/news/articles/2017-02-08/china-central-bank-said-to-call-bitcoin-exchanges-for-more-talks