https://www.theregister.co.uk/2018/02/05/china_crypto_currency_crackdown/

China has become the latest nation to attempt to cripple crypto-coin trading within its borders.

Banks on the mainland have informed state media they will "step up measures" to eliminate citizens trading in cryptocurrencies using overseas websites, with the help of the Middle Kingdom's Great Firewall, in addition to the previous bans on domestic crypto-coin-trading websites and services.