This is a unique symbol. It potentially relates to an individual. To decipher its meaning, we must further context. Perhaps it is associated with specific system. Looking into the source of this code would be helpful. Thomo Truc Tiep Da Ga 2023 Thoi gian den tai/vào/cho đến ngay thang/ngày tháng/ngày/ 15/mười lăm/năm mươi l�