Daxing's Small Classroom Episode 23｜Three Core Advantages of Transaction Mining I, Old Sun, will lay it out: In the world of transaction mining, transaction fees are no longer just an expense, but the starting point of revenue. First, negative cost trading. At the moment the order is completed, the transaction fee will flow back in the form of rewards, transforming the "cost spent" into the "revenue earned". Trading is no longer just about price differences, but it adds an extra layer of certainty in returns.