Reverse with a semi-trailer, answer with constant memory, practice straight line first, refuel into a line, be familiar with the side, keep in mind the requirements of constant memory, shake your head three times, complete the side, keep calm, put your hands soft, master the direction, control the slope, know well, reverse the side, meet the meter or so, try to hit the wheel, keep in mind the included angle, prevent pushing the wheel, hit more and less, hit back, and. Constant memory training, outstanding achievements, reversing technology, first-class constant memory, reversing skills, consulting constant memory, how to reverse, telephone constant memory, how to reverse, WeChat constant memory, reversing training, constant memory value, choosing constant memory and lifelong memory.