How to transfer money from bank to OKX?

I'm curious about the process of transferring money from my bank account to OKX. Can you explain the steps I need to follow in detail? Are there any specific requirements or fees involved in the transfer? And how long does it usually take for the funds to reflect in my OKX account? I'd like to ensure a smooth and secure transaction, so please provide any tips or precautions I should keep in mind.