Beijing on August 30, known as the “first killer of life and health” cancer, people smell pale, but if we can find out this “killer” early, it will be difficult to “murder”. The “research and development and evaluation of liquid biopsy technology for early diagnosis of malignant tumor screening” project, which was listed in the national key R & D plan, was recently launched in Beijing to help breakthrough in key technologies of early screening of multiple cancer species. < / P > < p > “early screening and early diagnosis is the most effective way to reduce the mortality of malignant tumors.” Professor Wang Jie, project leader and director of internal medicine of Cancer Hospital of Chinese Academy of Medical Sciences, said that high-throughput liquid biopsy is a breakthrough to realize early screening and early diagnosis of cancer, but at present, the research of this technology faces bottlenecks such as insufficient test sensitivity and lack of high-specific molecular targets for liquid biopsy. < / P > < p > we learned at the launching ceremony that the project is a key special support project of the national key R & D plan “Research on the prevention and control of major chronic non communicable diseases”. The goal is to break through the key technologies of liquid biopsy for cancer screening, early diagnosis and treatment, build a high sensitivity, high specificity, efficient and economic technology system for early diagnosis of malignant tumor, and develop a new technology system for early diagnosis of malignant tumor with high sensitivity, high specificity and high efficiency The screening / early diagnosis kit with independent intellectual property rights has been verified in large-scale multi center prospective cohort for lung cancer and digestive system cancer. Liu Qian, deputy director of colorectal surgery, cancer hospital, Chinese Academy of Medical Sciences, believes that the detection rate of early cancer and precancerous lesions can be improved by extracting peripheral blood to detect the free DNA released by tumor cells into the blood. “With the continuous improvement and development of technology, it is possible to achieve the sensitivity and specificity similar to that of invasive examination, and at the same time, it is easy to operate, noninvasive and standardized.” “< p > < p >” Chinese patients with malignant tumors often go to the hospital late. ” He Jie, academician of the Chinese Academy of Sciences and director of the National Cancer Center, said at the launching ceremony of the project that research on cancer screening, early diagnosis and early treatment should be more in-depth, universal and practical, so as to benefit patients.