B??c 3: H??th?ng s??cung ?ng ??n m?t mã QR ???ng??i ch?i ti?n hành quét thông tin, v?i th?i h?n di?n tra trong ten phút cho ng??i ch?i chuy?n ti?n.A lot of retail outlets and eating places have prolonged hours of operation, specially in significant-visitors regions. Employees in these sectors usually perform in shifts to protect these several