The condition that the document delivery of reading show can't meet is that as long as someone has consulted this book, then this book can't be consulted by others and can't be delivered. Reading show is a very huge database, which consists of massive full-text data and basic information. There are more than 430,000 Chinese books with 654.38+billion pages of full-text materials, which provide users with in-depth chapter and full-text retrieval, original reading of some documents, and efficient one-stop retrieval of various academic documents.