Ultimately, the most rigorous traceability solutions, including QR codes and microchips, won't be useful if people don't actually check them as a condition of making their purchases. Imitators can simply counterfeit QR code labels, for example.
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Maggie 姐在尖东新花都夜总会（图：南方人物周刊记者 方迎忠）
圖像來源，Enid Din/@enid.din
It emerged this week that Zimbabwe had halted negotiations with the US for $350m (£258m) of health funding, saying the proposals risked undermining its sovereignty and independence.