A C1 license cannot be directly upgraded to an A2. With a C1 driver's license already in hand, the fastest way to obtain an A2 license is to upgrade to a B1 or B2 license after holding the C1 license for one year. After obtaining the B1 or B2 license, you must have three years of professional driving experience before you can apply for the A2 license. Therefore, upgrading from a C1 to an A2 license takes at least four years. Alternatively, you can take a second approach by directly obtaining a B2 license. With three years of driving experience after obtaining the B2 license, you can then upgrade to an A2 license. This method is faster, though it does not involve upgrading directly from a C1 license. According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses" (Ministry of Public Security Order No. 123) of the People's Republic of China, the following conditions must be met for upgrading a driver's license: Article 14: Holders of a motor vehicle driver's license applying to add permitted vehicle types must not have accumulated 12 penalty points in the current scoring cycle or the most recent scoring cycle before application. Applicants seeking to add medium-sized buses, tractor-trailers, or large buses as permitted vehicle types must also meet the following requirements: Applicants seeking to add medium-sized buses must have held a license for city buses, large trucks, small cars, small automatic transmission cars, low-speed trucks, or three-wheeled vehicles for at least three years and must not have accumulated 12 penalty points in the three most recent consecutive scoring cycles before application. Applicants seeking to add tractor-trailers must have held a license for medium-sized buses or large trucks for at least three years, or have held a license for large buses for at least one year, and must not have accumulated 12 penalty points in the three most recent consecutive scoring cycles before application. Applicants seeking to add large buses must have held a license for medium-sized buses, city buses, or large trucks for at least five years, or have held a license for tractor-trailers for at least two years, and must not have accumulated 12 penalty points in the five most recent consecutive scoring cycles before application. In temporary residence areas, permitted vehicle types that can be added include small cars, small automatic transmission cars, low-speed trucks, three-wheeled vehicles, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, and light motorcycles. Article 15: The following circumstances disqualify applicants from applying for large buses, tractor-trailers, medium-sized buses, or large trucks: Being responsible for a fatal traffic accident with equal or greater liability; Driving under the influence of alcohol; Having a driver's license revoked or rescinded within the past ten years. According to the "Permitted Vehicle Types and Codes" (Ministry of Public Security Order No. 139) of the People's Republic of China: The A1 license permits driving large buses, specifically large passenger vehicles, and also allows driving vehicles under A3, B1, B2, C1, C2, C3, C4, and M. According to the "Permitted Vehicle Types and Codes" (Ministry of Public Security Order No. 139) of the People's Republic of China: The A2 license permits driving tractor-trailers, specifically heavy and medium-sized full trailers or semi-trailer combinations, and also allows driving vehicles under B1, B2, C1, C2, C3, C4, and M.
