Can I still use my C1 license while upgrading to B2?

[Haven]

C1 license holders can still drive while upgrading to a B2 license. During the probation period after adding the new vehicle class, driving vehicles permitted under the original license is unrestricted. To upgrade from a C1 to a B2 license, applicants must pass exams and meet the following conditions: Age between 20 and 60 years old; height not less than 155cm; holding a C1 license for at least one year; no record of accumulating 12 penalty points in the current or previous scoring cycle. Specific process for applying for a B2 license: Apply to the vehicle management office for adding the B2 license class; fill out the application form, submit ID and health examination report. To upgrade from a C1 to a B2 license, applicants must pass exams and meet the following conditions: Age between 20 and 60 years old; height not less than 155cm; holding a C1 license for at least one year; no record of accumulating 12 penalty points in the current or previous scoring cycle; visual acuity must be at least 5.0 on the logarithmic visual acuity chart; no record of drunk driving or being primarily responsible for a fatal traffic accident while holding a C1 license. Specific process for applying for a B2 license: Apply to the vehicle management office for adding the B2 license class; fill out the application form, submit ID, health examination report, and original driver's license; attend scheduled theory and practical exams; the new license will be issued by the vehicle management office within 7 working days after passing the exams.