Introduction to Ditan Book Market: It is held 2-3 times a year, namely the Spring Book Market (between April and May each year), the Autumn Book Market (between September and October each year), and the Winter Book Market (between November and December each year). ). As an annual book event in Beijing, the Ditan Book Fair has a great influence among readers. It has become a popular and branded mass book cultural event for people in the capital, attracting attention from all walks of life.