Several bases for diagnosing liver cancer: 1. History of hepatitis B or only hepatitis B two-pair half problem (in China, about 85% of liver cancer patients have hepatitis B foundation, a small number of patients do not have hepatitis B foundation, but long-term history of alcohol consumption is also one of the high-risk factors; in western countries, most of them have hepatitis C and alcoholic cirrhosis foundation, and the incidence of hepatitis C and alcoholic cirrhosis in China is on the rise in recent years. 2.B ultrasound and CT or MRI suggest liver occupancy, and the imaging characteristics are consistent with liver cancer (e.g. CT scan shows that the contrast agent in the mass is “fast in and fast out”). 3. High AFP (70-80% of liver cancer patients are high, while 20-30% of patients are not high). 4.If liver occupancy is found, the most accurate biopsy is a puncture biopsy of the mass if necessary.