The application time is February 2024 1. According to the inquiry of official website of the National Natural Science Foundation of China, according to the funding management arrangement of the National Natural Science Foundation of China, the application for the National Natural Youth Fund in 2024 began on February 1. Applicants should log in to the network information system of the National Natural Science Foundation of China and write an application form according to the outline and related requirements of various project applications. There are many types of national natural funds, including general fund projects, major fund projects, key fund projects and youth fund projects. Natural Youth Fund usually supports young doctors under the age of 45. Although the amount of funding is less than that of general projects, the level is the same, all of them are national, and they are also considered as national natural funds in the evaluation of professional titles and performance appraisal.