The computer doesn't need to be unlocked when brushing. If you can't brush lessons on the computer, you can only brush lessons on the coach's car, so the computer doesn't need to be unlocked. Coach car is a special vehicle for driving training school, which is mainly used for the training of driving students. Different from ordinary special vehicles, the coach car has its special requirements, and its technical conditions should meet the requirements of GB7258 and the technical conditions above the second class specified in JT/T 198.