This represents a unique identifier. It could indicate a product. To gain insight into its meaning, we need further context. Perhaps it corresponds to a specific system. Examining the source of this symbol would be helpful. Da Ga Thomo Truc Tiep 2023 Thoi gian den tai/vào/cho đến ngay thang/ngày tháng/ngày/ 15/mười lăm/năm mư