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What kind of weak inspection book does Guangzhou Railway Bureau use?

Color blindness chart sixth edition.

The sixth edition of color blindness examination chart is universal in China. Guangzhou Railway Bureau uses the sixth edition. Color blindness inspection chart is listed as the standard version of color vision inspection by the Ministry of Education and the Ministry of National Defense, which is used for enrollment and recruitment.

The railway bureau recruits, especially locomotive attendants, and the inspection of weak color is very strict. Color blindness is not strict, and it is very dangerous for locomotive crew members to be confused about the color of signal lights.