What are the signs in the library?

No smoking, no taking pictures, no noise, no eating, etc.

When you enter the library, you must dress neatly, cleanly, generously and appropriately. Don't wear slippers, vests or shorts. Don't take too many personal belongings in case they are stolen. If you need to carry it, it should be placed or stored according to regulations. To enter the library, we must maintain public health and public order. Don't grab the road, don't crowd people, enter in order.

The mobile phone should be turned off or vibrated to prevent noise. Try not to make noise when you walk. Don't wander around, chase, eat, chew gum or throw rubbish anywhere in the library. No smoking, no spitting.

In China, the common criteria for classifying libraries are as follows:

1, according to the library management system (affiliation). Such as: cultural system library, educational system library, scientific research system library, trade union system library, Communist Youth League system library, military system library, etc.

2. According to the collection scope of documents. Such as: comprehensive library, professional library, etc.

3. Divided by user groups. Such as: children's library, blind library, minority library, etc.

4, according to the book carrier division. Such as: traditional library, digital library, mobile library, real library, etc.

Refer to the above? Baidu encyclopedia-library