This details about unique symbol. It suggests a product. To understand completely its meaning, we require further context. Perhaps it is associated with specific system. Looking into the source of this code would be important. Thomo Truc Tiep Da Ga 2023 Thoi gian den tai/vào/cho ??n ngay thang/ngày tháng/ngày/ 15/m??i l?m/n?m m??i l?m