Recently, I saw someone on the blockchain bragging "I caught an arbitrage opportunity," and I found it both funny and a bit frustrating: many times you think you're making money, but you're actually paying fees to others, especially in sandwich attacks, where they sandwich you from both sides and trap you clearly. To put it simply, whether you can actually profit from arbitrage depends on whether you're being forced to act as a liquidity sponsor. And those on-chain data tools and tagging systems, recently they've been criticized for being outdated or misleading, so I now just treat them as references and don't trust them completely; if I really want to act, I’d rather spend more time verifying the trading paths, slippage, and the changes in the blocks before and after the transaction myself. Anyway, my definition of "opportunity" has changed now: only what can be reproduced and explained counts; those that can't be clearly explained are probably scripts arranged by others. That's all for now.