这是ETH交易的自定义信息。信息会被记录到以太坊链上。考虑到以太坊链的总容量一直在快速膨胀,并不建议日常交易都这样发送消息。
如果好奇,你们可以看看这位北大的学生写了什么(选为UTF-8):
https://etherscan.io/tx/0x2d6a7b0f6adeff38423d4c62cd8b6ccb708ddad85da5d3d06756ad4d8a04a6a2
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