What do the first code and the second code of civil servant physical examination mean?

Disturb the sample and information twice. According to the information of jiangsu provincial party committee Organization Department in the inquiry, the competent department of civil servants specially redone the blood sample number and the examinee's personal information, rearrange the coding order and then hand it over to the medical examiner, sometimes twice, which is divided into primary coding and secondary coding, which is conducive to enhancing fairness.