Is an exam required to upgrade from a C1 to a B2 driver's license?

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An exam is required. Below are the conditions for upgrading from a C1 to a B2 license: Hold a small car C1 driver's license for at least 3 years, with no full-point records in the last three consecutive scoring cycles, aged between 20 and 50 years old, have not been involved in a traffic accident resulting in death with equal or greater responsibility; have not driven under the influence of alcohol; and have not had the driver's license revoked or canceled within the past ten years. C1 is a code for a type of driver's license. According to the 'Regulations on the Application and Use of Motor Vehicle Driver's Licenses' (Ministry of Public Security Order No. 123), C1 refers to a license that permits driving small and micro passenger vehicles, light and micro cargo vehicles, as well as light and micro special-purpose vehicles. It also allows driving vehicles under the C2, C3, and C4 license categories. A B2 license permits driving heavy and medium-duty cargo trucks or large, heavy, and medium-sized special-purpose vehicles. Heavy and medium-duty cargo trucks are mainly trucks, such as the large dump trucks commonly seen on roads, which fall under the category of heavy trucks. Large, heavy, and medium-sized special-purpose vehicles refer to vehicles equipped with specialized equipment or tools, such as water sprinklers, concrete mixers, fire trucks, etc. Article 14 of the 'Regulations on the Application and Use of Motor Vehicle Driver's Licenses' states that first-time applicants for a motor vehicle driver's license may apply for license categories such as city buses, large trucks, small cars, small automatic transmission cars, low-speed cargo vehicles, three-wheeled cars, small automatic transmission passenger vehicles for the disabled, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, light motorcycles, wheeled self-propelled machinery, trolleybuses, and trams. For those who already hold a motor vehicle driver's license and wish to add additional license categories, the categories that can be added include large buses, tractors, city buses, medium-sized buses, large trucks, small cars, small automatic transmission cars, low-speed cargo vehicles, three-wheeled cars, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, light motorcycles, wheeled self-propelled machinery, trolleybuses, and trams. Article 15 states that those who already hold a motor vehicle driver's license and wish to add additional license categories must not have accumulated 12 points in the current scoring cycle or the most recent scoring cycle before the application. Applicants wishing to add medium-sized buses, tractors, or large buses must also meet the following requirements: Applicants for adding a medium-sized bus license category must have held a city bus, large truck, small car, small automatic transmission car, low-speed cargo vehicle, or three-wheeled car license for at least three years and must not have accumulated 12 points in the last three consecutive scoring cycles before the application. Applicants for adding a tractor license category must have held a medium-sized bus or large truck license for at least three years or a large bus license for at least one year and must not have accumulated 12 points in the last three consecutive scoring cycles before the application. Applicants for adding a large bus license category must have held a city bus, medium-sized bus, or large truck license for at least five years or a tractor license for at least two years and must not have accumulated 12 points in the last five consecutive scoring cycles before the application. Full-time driving vocational education students who have obtained a small car license while in school and have not accumulated 12 points in the current scoring cycle or the most recent scoring cycle before the application may apply to add large bus or tractor license categories.