Suggested to go to the small partners early in the morning and so on, in order to ensure the viewing effect, the library is open, the limited number of people, the humidity is very heavy, but very stuffy, a few heads have been touched shiny, the key library will also remind: do not take the bones home. I really don't understand that this is also taken by some people, but also to remind that the last section of the rotating staircase, or need some physical strength.