1. Theoretically, there will be no problem. The scope of duplicate checking of doctoral thesis is other papers written by graduated doctors, and it will not be found in the National Natural Science Foundation. However, the scope of duplicate checking after the application of NSFC is the database of various funds of NSFC.
However, I suggest that you adjust your language properly before submitting. Generally speaking, the writing style of natural science foundation and doctoral thesis should be slightly different. The foundation should be as concise and profound as possible, and the doctoral thesis should pay more attention to system integrity.
3. Originality of the article: The article in the application submitted by the applicant must be original, unpublished or accepted by other journals or publications, and plagiarism detection.