Do I need to retake Subject 1 when upgrading from C2 to C1?

[Brooke]

C2 upgrading to C1 requires retaking all subjects from Subject 1 to Subject 4 for the C1 vehicle type. The C2 driver's license is a type of driving license that only allows driving small and micro automatic passenger vehicles, as well as light and micro automatic cargo vehicles. The C2 license is also one of the more common driving licenses, permitting the driving of automatic vehicles with no more than 9 seats and a length not exceeding 6 meters. C1 License Test: The test subjects include four items: traffic regulations and related knowledge, field driving, road driving, and safe and civilized driving knowledge. Passing Standards: Traffic Regulations and Related Knowledge (Subject 1) – Written test, full score of 100, 90 or above is passing. Field Driving (Subject 2) – On-site, actual vehicle. Minimum requirement is 80 points, below 80 is failing. Road Driving (Subject 3) – Highway or simulated site, actual vehicle. Full score of 100, must achieve 90 or above to pass. Safe and Civilized Driving Knowledge – Written test, questions mainly in the form of cases, pictures, animations, etc., with question types including true/false, single-choice, and multiple-choice, totaling 50 questions, full score of 100, 90 is passing.