Alas, I have seen countless small tricks on public chains that always fall victim to them. To summarize, there are usually two types: To receive an airdrop, tokens are usually released to you on the local network, but exchange recharge only supports mainnet, so you may encounter: 1. The token has been withdrawn from the local network liquidity pool and cannot be sold, so the token of the main network cannot cross chains 2. To receive tokens on the main network, a gas recharge is required, but the gas consumed is already greater than the airdrop value Another way is to appear across chains, which is very simple: It only takes one second to step in, and overcoming countless difficulties to step out I understand now. For public chains that are not supported by exchanges, don't invest money in them when you have nothing to do. Once you invest, you will definitely not be able to exit; I'm not playing anymore. Pay back the money 😭😭😭