That is, customers come to buy books, such as history books, but most of them don't know where they are, so customers usually ask. At this time, the duty of the shopping guide is to tell customers where to put such books, so that customers can find them conveniently. In addition, if customers want to buy books on Chinese medicine, but there are too many books on Chinese medicine, you can also talk to them if you don't know which one to buy.