Can a C1 license be upgraded to an A3 license?

[SanMia]

C1 license can be upgraded to A3 license. Here are the specific details for upgrading from C1 to A3: 1. To upgrade from C1 to A3, you need to retake all tests from Subject 1 to Subject 4. Among them, Subject 1 and Subject 4 are the same as those for C1, which are theoretical and civilized driving tests, while Subject 3 is also the same as C1, which is the road test. Only Subject 2 is different. 2. Subject 2 for A3 license consists of 16 items, including reverse parking, parallel parking, hill start, single-plank bridge, curve driving, right-angle turn, driving over bumps, passing through a narrow gate, driving on undulating roads, U-turn on a narrow road, simulating continuous sharp turns on mountain roads, simulating rainy and foggy weather, simulating slippery roads, simulating tunnel driving, simulating highway driving, and simulating emergency handling. 3. A3 is an urban bus driver's license and is also the only A-level license that can be applied for when applying for the first time. It is the only A-level license that can be directly upgraded from a C1 license.