1. Yearbook is an informative reference book with the main content of comprehensively, systematically and accurately describing the movement and development of things in the previous year. Collect important current events, documents and statistical data within one year, and publish reference books continuously every year. It absorbs the wisdom of all others and integrates dictionaries, handbooks, chronologies, catalogues, bibliographies, indexes, abstracts, tables, statistics, guides and sketches. It has the characteristics of authoritative information, timely response, continuous release and complete functions. This is an information-intensive reference book.

2. Concept: reference books are edited and published every year, and news, events, data and statistical data in a year are collected and sorted by category.

3. Features: dense information, continuous publication, accurate materials and novel contents.

4. Types: comprehensive yearbooks, professional yearbooks, local yearbooks and statistical yearbooks.

5. There are yearbooks in all five volumes of Song History, Art and Literature. Not today. Today's so-called yearbook refers to a reference book that collects information, statistical data and other information in all aspects or aspects within a year or until the year of publication. Such as: world knowledge yearbook, education yearbook, etc.