Patients with leukemia should first undergo a routine blood test. Some leukemia patients' routine blood tests may indicate leukemia, such as when white blood cell counts are abnormally high, exceeding 50*10^9/L, and can even reach more than 100*10^9/L, which highly suggests leukemia. At this point, bone marrow biopsy, bone marrow immunotyping, and chromosome tests are needed to further clarify the type of leukemia. In addition, risk stratification in leukemia patients is also necessary through genetic mutations and chromosome analysis.