Excuse me, could you please clarify the transaction fee structure for Phemex? I'm interested in understanding the costs associated with executing trades on the platform. Specifically, are there any flat fees, percentage-based fees, or any other fees that I should be aware of? Additionally, do these fees vary depending on the type of transaction or the size of the trade? It would be greatly appreciated if you could provide a detailed breakdown of the transaction fees for Phemex.