Theoretically, there will be no problem. The scope of duplicate checking of doctoral thesis is the thesis written by other graduated doctors, which will not be found in the National Natural Science Foundation of China. The scope of duplicate checking after the application of the National Natural Science Foundation of China is the database of various funds of the Fund Committee. I suggest you adjust your language appropriately before submitting it.

Generally speaking, the writing style of natural science foundation and doctoral thesis should be slightly different. The foundation is as concise and profound as possible, and the doctoral thesis is more systematic and complete.