Semi-trailers must use the first gear when driving and starting. The clutch pedal should be released steadily but not violently. Avoid using half clutch to prevent the clutch friction plate from burning out. The throttle should be increased appropriately. If the wheel difference is large, such as the distance of the front corner outside the car body, a large turn should be taken as much as possible. Semi-trailers generally have all-wheel brakes, so the braking performance is better, and the brakes can be used appropriately. When the semi-trailer is reversing, the steering wheel should be turned in the opposite direction of the reversing direction. When the tractor and trailer are in a straight line, start reversing. To make the rear end swing to the left (right), the steering wheel must be turned to the right (left). When the rear end is found to have swung in the target direction, the steering wheel should be turned appropriately immediately. If the rear end does not swing enough, the steering wheel can still be turned to the right (right). If the rear end swings too much, it should be turned to the left (right) more. When the semi-trailer turns around, it should generally choose a wider intersection so that the car can be driven and reversed at one time.
When the tractor needs to be separated from the semi-trailer, first plug the front and rear tires of the semi-trailer with triangular wood or stones to prevent it from sliding, then lower the auxiliary support frame of the semi-trailer to contact the ground, unplug the joints of the brake pipe and the plug of the light cable, and then open the locking mechanism of the saddle grinding disc to drive the tractor away from the semi-trailer to complete the separation. To reassemble the tractor and the semi-trailer, operate in the opposite and equal distance of the sharing.