1. Market demand: The publisher thinks that the demand for children's books in the current market is low, or there is a lack of demand for specific types of children's books in specific regions or time periods.

2. Author resources: lack of suitable authors or writer resources to create children's books, including lack of local or domestic writers or writers who have not provided relevant creative content.

3. Capital investment: Publishers are cautious about children's books in investment decisions, because it requires a lot of capital investment, including book creation, editing, illustration, printing and promotion.

4. Market competition: The fierce competition in children's books market makes it more difficult for publishers to enter this field.

5. Education policy and curriculum: Changes in education policy and curriculum lead to fluctuations in children's book demand. Changes in the way educational institutions use or recommend children's books will affect publishers' interest and investment in this field. Children's book publications are books specially created and published for children readers. These books are rich in content and suitable for children to read according to their age, interest and development stage.