Okex is based in Honk Kong and founded in 2014. His founder Star Xu has been invastigating for money fraud and the invastigation are still on the table. Despite this the project is solid and the team looks legit. I advise you to follow how this invastingstion is going to develop. Overall it still trustable and it is in the top 5 exchange for volume.
Okex exchange has advantages like fiat trading, Intuitive UI, Token / Margin Trading, Futures Trading, Stabilize income, arbitrage and OK Blockchain Capital.