
The conditions for upgrading from C1 to B1 are: holding a C1 license for more than three years, being between 21 and 50 years old, and having no full-point record in the current scoring cycle when applying for a B1 license. Circumstances under which you cannot apply for an upgrade from C1 to B1: Causing a traffic accident resulting in death and bearing full or primary responsibility, driving under the influence of alcohol, having a record of driving under the influence of alcohol in the current scoring cycle and the three consecutive scoring cycles prior to application, driving a motor vehicle at more than 50% above the speed limit in the current scoring cycle and the three consecutive scoring cycles prior to application, and the motor vehicle driver's license has not been revoked. The process for upgrading from C1 to B1: Apply to the local vehicle office in your registered residence for upgrading to a B1 license, fill out the application form, submit your ID card and physical examination form, submit your current motor vehicle driver's license, attend the theoretical and practical exams as scheduled, and receive the new driver's license from the applying vehicle management office within seven working days after passing the exams.

I also wanted to upgrade from C1 to B1 before and specifically checked the requirements. The age must be between 20 and 60 years old, and you must have held a C1 driver's license for at least one year—these are non-negotiable conditions. The key point is that you haven’t accumulated 12 penalty points in the last two scoring cycles, which can be checked via the Traffic 12123 app. For the physical examination, your vision must meet the standard—corrected to 5.0—with no red-green color blindness or any diseases that could affect safe driving. When applying, you’ll need to prepare your original driver's license, ID card, medical examination report, and a white-background photo, and submit the application at the local vehicle management office in your registered residence or place of residence. The test covers subjects one to three, with increased difficulty, especially in reversing and the road test.

My friend just completed the additional driver's license process and learned many details. The primary requirement is that you must have held a C1 license for over a year, with no more than 12 penalty points during that period. The medical examination focuses on vision and limb coordination, and high blood pressure may disqualify you. After registration, you need to retake all subject exams, with Subject 2 now including additional items like tunnel simulation. The training period typically lasts 1-3 months. Remember to get specialized driver's license photos taken at a photo studio first, and arrive early for the on-site medical check at the vehicle office to avoid missing the pre-selected exam slot, which would delay you to the next batch.

About upgrading to a B1 license, I asked my coach back then. Firstly, you must be at least 20 years old and have held a C1 license for at least one year. The medical examination form requires special attention to the color vision and eyesight sections, which must pass. When applying, bring your driver's license and ID card to the DMV office. The process includes registration, scheduling the test, and traffic regulations study. The theory test adds bus-related knowledge compared to the C1, and the practical test requires practicing 90-degree turns with a 10-meter medium-sized bus. After obtaining the license, be cautious during the probation period, as getting 6 demerit points will extend the probation by one year.

The key to upgrading from C1 to B1 lies in meeting these three strict criteria: age 20+, holding a C1 license for one year without serious violations, and passing the physical examination. When I applied, I started preparing three months in advance—clearing all traffic violations before submitting the upgrade application. Avoid staying up late before the medical check to prevent high blood pressure. The toughest part of the test is reverse parking and garage shifting, so choose a driving school that offers night-light simulation training. The file transfer from the traffic system is seamless, and the new license arrives within two days after passing the exam.

As an experienced driver, it's advisable to make these preparations before upgrading your license: verify that both your driving experience and age meet the requirements, and clear all traffic violation records. The medical examination includes not only routine items but also dynamic vision tests; color blindness will result in immediate rejection. Focus on passenger transport regulations and emergency first aid for the theoretical test, and pay attention to handling vehicle blind spots during practical training. After passing the exam, your original C1 license will be revoked, and the new license will be combined into a B1D license, allowing you to drive passenger vehicles with up to 19 seats. The entire process takes about two months, and costs vary significantly by region.


