Many people are confused about how to detect tumors at an early stage and get more timely treatment to get a chance of cure. (Multi-tumor marker protein chip detection system can detect 12 tumor markers at one time with only 0.5mls of serum) Cancer is highly prevalent and harmful: At present, cancer patients are increasing and showing a trend of youthfulness. Statistics show that people above 40 years old are the high incidence of tumors, but with the deterioration of the environment, this age limit is being adjusted downward. The cost of malignant tumor treatment is expensive, which not only causes great pressure to individuals but also brings heavy economic burden to families and society. Early detection, early diagnosis and early treatment are the key to cure: clinical treatment of tumors adopts the policy of “prevention-oriented, combined with prevention and treatment, with emphasis on three early stages (early detection, early diagnosis and early treatment)”. Recent statistics from the World Health Organization show that if cancer patients can be detected early, the cure rate can reach 80%. Early detection methods include morphology, imaging, immunology, etc. The first two methods can be found only when the tumor grows to a certain size, but some patients have already missed the early stage, especially for symptomatic patients. For asymptomatic patients, it is difficult to receive imaging examination due to economic, invasive and conceptual reasons. At this time, immunological detection is the most suitable method, which can indicate the occurrence and development of tumor by quantitatively detecting the content of certain markers secreted by tumor cells. NSE, SCC, CK19), which can detect the development of tumor, post-surgical residual and post-operative recurrence in a more scientific way, and is the best choice for early detection of tumor. (1) Wide detection range: It can detect many kinds of tumors at the same time, such as: liver cancer, stomach cancer, esophageal cancer, lung cancer, pancreatic cancer, breast cancer, prostate cancer, colon/rectum cancer, ovarian cancer, endometrial cancer, etc. (2) Convenient, safe and fast detection: 2ml of blood is drawn from a non-anticoagulated common tube (patients do not need to fast), 0.5ml of serum is extracted, and protein microarray detection is performed. (3) High accuracy: By quantifying 12 commonly used clinical tumor markers at the same time, the false positive and false negative rates of the test are reduced. The accuracy of the test has been clinically verified to reach 85%. (4) Low cost of testing: The cost of testing is 1/3 of the total price of 12 single marker tests, and is covered by medical insurance reimbursement. Application: (1) Tumor screening for healthy people. (2) Medical examination for people with family history of tumor and people in areas with high incidence of tumor. (3) Clinical auxiliary diagnosis of tumor patients. (4) Monitoring the efficacy of cancer clinical treatment.