Center for Medical Device Technology Evaluation of the State Drug Administration: For products included in the catalog of in vitro diagnostic reagents exempt from clinical trials, no less than 100 samples should be selected for research during clinical evaluation. Quantitative detection reagents with different reference intervals due to known physiological changes (such as different female menstrual cycles, sex, age, etc.), such as luteinizing hormone detection reagents, have different references in women of different sexes and different menstrual cycles For the interval, the expected applicable population samples and interference samples should be selected for the concentration coverage linear/measurement interval for research, and it is not necessary to perform stratified statistics on the population of different reference intervals. For detection reagents with significantly different guiding significance for clinical decision-making with reference intervals for different populations, such as full-scale C-reactive protein detection reagents, at least 100 samples should be included in the applicable population of hypersensitivity and general-purpose reference intervals for clinical evaluation, and different stratified statistics of the population.