How does CoinEx work?

Could you please explain in detail how CoinEx operates? I'm particularly interested in understanding the platform's CORE functionalities, such as its trading engine, wallet system, and the security measures it employs to safeguard user funds. Additionally, I'd like to know about the types of digital assets that are supported on CoinEx, as well as the trading pairs available for users to trade with. Lastly, can you shed some light on the trading fees and any other potential costs associated with using the platform? Thank you in advance for your informative response.