It only requires one drop of blood for 1 minute to detect the three groups of white blood cells (Lymphocytes, neutrophils and Middle group). This POCT device has already cooperated with Sysmex XN-1000 blood cell analyzer has been used in more than 5,000 clinical comparisons, with a consistency of more than 99%. It is very convenient to identify infectious diseases such as headache, brain heat, cold, fever, abdominal pain, diarrhea, which belong to viral infection or bacterial infection, whether antibiotics should be used, and whether drugs are effective after taking them.