In some major Chinese cities like Beijing and Shanghai, certain public restrooms have installed "smart" urinals that analyze urine samples for various health indicators. These urinals are equipped with sensors and AI that can detect markers like glucose, vitamin C, creatinine, white blood cells, and more. Users can receive a brief health report on-screen or via a smartphone app after urinating, often for a small fee. Here's a more detailed breakdown: How it works: The smart urinals use biosensor

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