The reasons for the formal review of youth funds include incomplete or unqualified application materials, unclear and specific research contents and methods, and insufficient research significance and innovation. The solution is as follows:

1. Incomplete or unqualified application materials: If the materials are incomplete or unqualified, relevant materials shall be supplemented or revised in time according to the review opinions to ensure the completeness and conformity of the application materials.

2. The research contents and methods are not clear and specific: the research contents and methods are not clear and specific, so it is necessary to reorganize the research ideas and methods, clarify the research objectives and programs, and ensure that the research contents and methods are clear and feasible.

3. The research significance and innovation are not prominent enough: if the research significance and innovation are not prominent enough, it is necessary to re-examine the scientific value and social significance of the research and think about how to increase the innovation and contribution of the research and improve the success rate of the application.