This is a unique symbol. It potentially relates to specific record. To fully comprehend its meaning, we require further context. It's possible it refers to a specific system. Looking into the source of this symbol would be beneficial. 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