Because you cannot see everything behind your vehicle, backing is always dangerous. Avoid backing whenever you can. When you have to back, here are a few simple safety rules: Start in the proper position, look at your path, use mirrors on both sides, back slowly, back and turn toward the driver's side whenever possible, and use a helper with clear hand signals whenever possible. / 由于无法看清车后的一切,倒车始终有风险。能不倒车就避免;必须倒车时:从合适的位置开始、看清倒车路径、左右后视镜并用、缓慢倒车、尽量朝驾驶员侧倒并转向、尽量使用手势清晰的指挥员。