Why does Guangzhou Railway have to take an exam every time?

According to the actual situation of the railway department, regular examinations are necessary.

In particular, there will be more examinations for locomotive attendants (drivers) in the locomotive depot. First of all, there are monthly exams, quarterly exams, annual exams for all employees, personal safety exams, fire prevention exams, documents issued by superiors, and accident notifications. After learning, the crew should take the exam at least twice a week (arrive at 8: 00 a.m. 10 hour) and take notes.