What are the test contents for upgrading from C1 to B1 driver's license?

[MadelynLynn]

C1 driver's license holders who wish to upgrade to a B1 license need to take three test subjects, which are: Subject 1 (Road traffic safety laws, regulations, and related knowledge test); Subject 2 (Field driving skills test); Subject 3 (Road driving skills test and safe civilized driving common sense test). C1 driver's license: The C1 driver's license is one of the motor vehicle driver's license codes. The scope of vehicles allowed to be driven with a C1 license includes small and micro passenger vehicles, light and micro cargo vehicles; light, small, and micro special-purpose vehicles; and small passenger vehicles with a seating capacity of 9 or fewer people. Application age: The minimum age limit for a C1 driver's license is 18 years old, with no upper age limit. However, applicants aged 70 and above must pass tests on memory, judgment ability, and reaction ability.