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地铁扫码乘车的产品逻辑
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近一年来我国多个城市的地铁开通了扫码乘车功能，国内最早开通地铁的城市北京于4月29日起实现全网刷二维码乘车。五一假期本人亲自在广州体验了一把扫码乘车，本文将从产品（准确的说叫服务）的角度做一下分析总结。 为什么是二维码而不是NFC？ 网络上流传一篇文章《二维码
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