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。
