OKEX is a Digital Asset Exchanger from OKCoin. Both companies are based in China and focus mainly on the domestic market. OKEX offers a very low transaction fee compared to its competitors. If so, you can only trade 3 coins. The addition of futures contracts may be good for miners willing to hedge their "harvest".
Since OKEX is directly connected to OKCoin, CNY (Fiat) can be delivered to it, and more complex exchanges can be performed. In addition, cryptocurrency transfer is allowed in BTC, ETH and LTC.