What subjects need to be tested for upgrading from B2 to B1 license?

[AlanRose]

B2 to B1 license upgrade requires passing all three test subjects. Here are the relevant details: Training institution: Applicants should bring required materials to register at local motor vehicle driver training institutions. The training institution will then handle the procedure for adding permitted driving categories at the vehicle management office under its jurisdiction. Driving certificate: After passing Subject 1, the vehicle management office will issue a "Learning Driving Certificate" (valid for three years) within one working day. Applicants must complete Subject 2 and Subject 3 tests within this validity period. If tests are not completed within the validity period, passed subject results will become invalid.