Depending on the patient’s condition, the early warning system for liver cancer is divided into three levels of warning. Patients should first come to our center for a comprehensive examination and assessment, and experts will determine which level of warning should be entered according to your condition. Each of the three levels of warning focuses on different contents, mainly on the patient’s hepatitis activity, tumor warning indicators, liver shape and texture, such as ultrasound or CT and other comprehensive examinations and assessments. Chronic cirrhosis patients have nodules of different sizes in the liver, and liver cancer is often confused with these nodules or tumors develop from these small nodules. Also the timing of the examination may vary depending on the patient’s condition. For those patients who are considered to be at high risk for liver cancer need to enter the highest level of early warning system. During the course of the early warning examinations, we have identified many patients with small liver cancers and some suspected liver cancers. These patients usually present with nodules in the liver or significant changes in morphology in multiple cirrhotic nodules, and some patients also have significant changes in the blood warning indicators of tumors. For these patients, we will immediately perform definitive diagnostic operations (such as radiography and puncture) to quickly clarify the nature of the nodules, and once the diagnosis of liver cancer is clear, we will perform surgery as soon as possible. For other patients, although there are changes in the early warning indicators of blood tumors and nodules in the liver, but multiple biopsies still cannot definitively exclude liver cancer, we adopt minimally invasive treatment (such as DSA, radiofrequency or freezing) to eliminate the suspected lesions for safety and early intervention, which is commonly called “it is better to kill a thousand by mistake than to spare one”. At the same time, we will closely observe the changes of the damaged lesions for a long time. For patients whose indexes do not change significantly during the early warning examination, we will also provide appropriate treatment for hepatitis to minimize the destruction of the liver by the virus and thus reduce the occurrence of tumors. Liver cancer early warning system is an early warning system in which liver surgeons, oncologists and hepatologists with rich clinical experience work together to conduct professional examinations for each patient and provide examination, follow-up and guidance and consultation services for early detection, prevention and treatment of patients with potential risk of liver cancer. Therefore, the early warning system for liver cancer is completely different from general medical checkups. The purpose of liver cancer early warning system is to detect occupying liver lesions at the first time, so that the tumor can be treated and managed early and the patient can get the best treatment and prognosis, and to help and guide the high-risk group to carry out proper prevention and to observe and guide the post-operative patients of liver cancer.