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.
Александра Качан (Редактор)
，详情可参考旺商聊官方下载
kwentongskyblue
fmt.Printf("1 %v\n", nums)