April 20th-23rd every year. By inquiring about the announcement issued by the National Social Science Fund, we know that the National Social Science Fund is the main channel to support basic research in the field of scientific research in China, and it will be evaluated on April 20-23 every year. The National Social Science Fund, referred to as the National Social Science Fund for short, 1986 was established with the approval of the State Council and managed by the National Office of Philosophy and Social Sciences.