2. Precautions for application: If there are people (including graduate students) outside the applicant's supporting unit among the main participants, their unit shall be regarded as a cooperative research unit, and the information of the cooperative research unit shall be filled in the basic information table of the application form and the official seal of the cooperative research unit shall be affixed on the signature page, and the name of the unit filled in shall be consistent with the official seal. The cooperative research unit that has been registered with the Natural Science Foundation of China shall be stamped with the official seal of the unit registration; Unregistered cooperative research units shall be stamped with the official seal of the legal entity.