Established in 1985, the National Medical Examination Network is the exclusive website of the National Medical Examination Center, a specialized technical service institution for various national examinations in the health sector directly under the Ministry of Health, and one of the earliest national professional examination institutions in China.

Characteristics of physical examination center system;

1.CentOS can be understood as Red Hat AS series, which is completely released after the improvement of Red Hat AS, and its various operations and uses are no different from those of Red Hat.

2.CentOS is completely free, and there is no problem that red hat AS4 needs serial number.

3.CentOS's unique yum command supports online upgrade, which can update the system in real time, unlike Red Hat, which needs to spend money to buy support services.