It requires more than three years. Below are the conditions for upgrading from C1 to B2: Hold a small car C1 driver's license for more than 3 years, with no full-point records in the last three consecutive scoring cycles, aged between 20 and 50 years old, no record of causing a fatal traffic accident with equal or greater responsibility; no record of drunk driving; and the driver's license has not been revoked or canceled within the past ten years.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 driver's 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. The B2 driver's license permits driving heavy and medium-duty cargo vehicles or large, heavy, and medium-duty special-purpose vehicles. Heavy and medium-duty cargo vehicles are mostly trucks, such as the large dump trucks commonly seen on roads, which fall under the category of heavy-duty trucks. Large, heavy, and medium-duty special-purpose vehicles refer to vehicles equipped with specialized devices or equipment, 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 for first-time applicants of a motor vehicle driver's license, the permitted vehicle types include city buses, large trucks, small cars, small automatic transmission cars, low-speed cargo vehicles, three-wheeled cars, small automatic transmission passenger cars 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 permitted vehicle types, the additional types include large passenger vehicles, tractors, city buses, medium-sized passenger vehicles, 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 for those who already hold a motor vehicle driver's license and wish to add additional permitted vehicle types, they must not have a record of accumulating 12 points in the current scoring cycle and the most recent scoring cycle before the application. For those applying to add medium-sized passenger vehicles, tractors, or large passenger vehicles, the following additional conditions must be met: For adding medium-sized passenger vehicles, the applicant must have held a city bus, large truck, small car, small automatic transmission car, low-speed cargo vehicle, or three-wheeled car license for more than three years, with no record of accumulating 12 points in the last three consecutive scoring cycles before the application. For adding tractors, the applicant must have held a medium-sized passenger vehicle or large truck license for more than three years, or a large passenger vehicle license for more than one year, with no record of accumulating 12 points in the last three consecutive scoring cycles before the application. For adding large passenger vehicles, the applicant must have held a city bus, medium-sized passenger vehicle, or large truck license for more than five years, or a tractor license for more than two years, with no record of accumulating 12 points in the last five consecutive scoring cycles before the application. Students currently enrolled in full-time driving vocational education who have obtained a small car license at school and have no record of accumulating 12 points in the current and most recent scoring cycle before the application may apply to add large passenger vehicles or tractors to their permitted vehicle types.
