Although BTC has been doing better recently, USDT/CNY is still in a negative premium state. An interesting phenomenon: on Binance @binancezh, the OTC buy price for USDT is 6.83, and the sell price is 6.86. I remember this kind of situation happened before. If you really want to arbitrage, not sure if you can make money, but the real worry is getting called in by the authorities for a chat. Any OTC experts want to analyze this?