现在有厂家用NFC chip的。厂家出产品，产品上加NFC chip, 每一次交易都放在区块链上，买家可以看到。防伪还是有效的。
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什么项目？网址是什么？
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唯链跟LV合作做的防伪追踪，好像是这么个方案。
不过 要是有人就是想买A货咋办？
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我说的是很多农产品、低附加值的防伪项目，都属于概念炒作。真正要做防伪需要厂商下功夫改造生产线，在将商品信息上链，这样才是完整的解决方案。本质上区块链只是个不能篡改的数据库，因此重点在生产线的改造。实际上我们发现大部分假冒产品都是内部利益斗争的结果。使用区块链做溯源跟踪，这个倒是很有意义的事情，只是难度非常大，除非业务方真的需要。
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