How many subjects are required for upgrading from B2 to A1?

[VanEdward]

Upgrading from B2 to A1 is the same as initially applying for an A1 license, requiring four subjects. The following is the relevant content about upgrading from B2 to A1: 1. Subject 1 test content: Subject 1, Road Traffic Safety Laws, Regulations, and Related Knowledge Test; 2. Subject 2 test content: Subject 2, Field Driving Skills Test; 3. Subject 3 test content: Subject 3, Road Driving Skills Test; 4. Subject 4 test content: Subject 4, Safe and Civilized Driving Common Sense Test; Article 27 of the "Regulations on the Application and Use of Motor Vehicle Driving Licenses" states that the content of the motor vehicle driver's test is divided into the Road Traffic Safety Laws, Regulations, and Related Knowledge Test (hereinafter referred to as "Subject 1"), the Field Driving Skills Test (hereinafter referred to as "Subject 2"), and the Road Driving Skills and Safe and Civilized Driving Common Sense Test (hereinafter referred to as "Subject 3").