The actual scientific research needs, the contributions of scientific researchers and the related salary standards are determined independently. Natural science foundation projects that implement "contract system" management implement scientific research integrity commitment system and negative expenditure list system, and do not need to prepare budget and set subject proportion restrictions. Performance expenditure is determined by the project director independently according to the actual scientific research demand, the contribution of scientific researchers and related salary standards. The National Natural Science Foundation was formally established in February 1986, and is managed by the Ministry of Science and Technology rather than the directly affiliated institution of the State Council. Manage the National Natural Science Foundation in accordance with the law, operate relatively independently, and be responsible for organizing the implementation of funding plans, project initiation and evaluation, project initiation and supervision.