China's furtive bitcoin trade heats up again, worrying regulators
https://www.reuters.com/article/us-crypto-currency-china/chinas-furtive-bitcoin-trade-heats-up-again-worrying-regulators-idUSKCN2AT201
Bitcoin's 300% price surge since October has revived China's grey market in cryptocurrency trading, putting regulators on alert over financial risks and capital outflows as volatility spikes.