Blood sampling is a method of testing the components of various blood cells and solutes in the blood by drawing the patient’s blood to understand the patient’s physical condition. There are many kinds of blood tests, including: a) routine blood tests, blood type, blood sedimentation, reticulocytes and other routine tests; b) biochemical tests, including liver function, kidney function, electrolytes, lipids and other routine tests; c) serum tests, including five tests for hepatitis B, hepatitis C antibody, syphilis antibody, AIDS antibody, male tumor marker, female tumor marker, and mycoplasma antibody and chlamydia antibody. 4. special types of examination methods, such as concentration examination of various drugs, such as concentration examination of cyclosporine, methotrexate, etc.