登长城注意事项：
1. In any case， life is safety first.
任何情况下人生安全第一。
2. The more steep places to get into the habit of using hands and feet， including going down.
比较陡的地方要养成手脚并用的习惯，包括上去下来都是如此。
3. Hold your hand and take a picture.
先站稳再拍照。
4. Be careful not to put your bags between your body and the walls.
注意自己的包不要搁在身体和墙体之间。
5. Don“t force yourself to make a dangerous move to climb into a larger area.
碰到难度比较大的地段，不要勉强自己做出危险动作去攀越。