What is the highest license that can be upgraded from a C1 license?

[LeKaylee]

Upgrading a driver's license is a step-by-step process that requires meeting specific requirements before proceeding. China's driver's license classification is very detailed, with a total of 16 levels. Among them, the C-type licenses are divided into five categories: C1, C2, C3, C4, and C5. Simply put, a C1 license cannot be directly upgraded to an A2 license; you must first upgrade to a B license before applying for an A2 license. Driver's license levels: A1: Large buses and A3, B1, B2, C1, C2, C3, C4, M A2: Tractor-trailers and B1, B2, C1, C2, C3, C4, M A3: City buses and C1, C2, C3, C4 B1: Medium-sized buses and C1, C2, C3, C4, M (Medium-sized buses refer to those with fewer than 19 seats, such as minibuses and vans) B2: Large trucks and C1, C2, C3, C4, M C1: Small cars and C2, C3 (Small cars refer to passenger vehicles with fewer than 9 seats, such as sedans) C2: Small automatic transmission cars C3: Low-speed trucks and C4 C4: Three-wheeled cars C5: Small automatic transmission passenger cars for disabled individuals (specifically those with right lower limb disabilities, bilateral lower limb disabilities, hearing impairments, missing right thumbs, or missing finger joints) D: Regular three-wheeled motorcycles and E E: Regular two-wheeled motorcycles and F F: Light motorcycles M: Wheeled self-propelled machinery N: Trolleybuses P: Trams