What is the meaning of Tianfu Health Pass Health Code m 1506?

Number of days marked by health code. Tianfu Health Pass Health Code is the two-dimensional code electronic certificate of personal health status in Sichuan Province, and it is also the inspection basis for epidemic prevention and control. Among them, m 1506 refers to the number of days when Tianfu Health was marked with health code, 15 refers to the yellow code, and 06 refers to the sixth day when the detection information was negative after the yellow code.