What does OKCoin do?

So, I'm curious to understand what exactly does OKCoin do in the realm of cryptocurrency and finance? Are they primarily a platform for trading various digital currencies, or do they offer additional services like wallet storage, market analysis, or even lending and borrowing options? How do they ensure the security of transactions and user data, and what sets them apart from other similar platforms in the industry? Additionally, could you elaborate on their regulatory compliance status and any notable partnerships or collaborations they may have?