How much does it cost to list on OKX?

I'm curious about the cost of listing a cryptocurrency on OKX, one of the leading exchanges in the industry. Could you provide me with some insight into the financial implications of such an endeavor? Is there a flat fee or is the cost dependent on various factors such as the coin's market capitalization, trading volume, or perhaps the level of support needed from the exchange? I'd appreciate any information you have on the matter, as I'm considering listing my own digital asset on OKX.