After 20 1 1, the foundation began to use the duplicate checking system. If you don't get it, you can repeat it in principle, but only if you have the same applicant;

However, if too many books are found and passed, they will be cut off by the preliminary examination and will not enter the review stage.

Surface project: Surface project is the main part of the research project series of the National Natural Science Foundation, which supports the scientific and technical personnel engaged in basic research to independently select topics within the scope of the National Natural Science Foundation's funding, carry out innovative scientific research, and promote the balanced, coordinated and sustainable development of various disciplines.