Lung cancer currently has the highest incidence and mortality rate of any tumor. According to a study by the World Health Organization (WH0) International Agency for Research on Cancer, the cancer with the highest incidence worldwide is lung cancer, with 1.2 million new patients each year; followed by breast cancer with about 1 million patients; intestinal cancer with 940,000, stomach cancer with 870,000, liver cancer with 560,000, cervical cancer with 470,000, esophageal cancer with 410,000, etc. In recent years, lung cancer mortality rate has jumped to the top of group cancers in Beijing, Shanghai, Guangzhou, Hefei, Nanjing and other cities. Chinese oncologists predict that the incidence of lung cancer will continue to rise sharply in the next two to three decades and will continue to be the malignant tumor with the highest incidence and mortality rate in China. The latest statistics show that the incidence and mortality rate of lung cancer in Beijing is the highest among all malignant tumors, with an incidence rate of 49.6/100,000 for men and 34/100,000 and 17/100,000 for women, respectively. The number of new lung cancer cases is increasing at a rate of 3% per year. About 1.4 million patients die from lung cancer worldwide each year. According to the statistics released by the National Health Commission, the mortality rate of lung cancer currently stands at 30.83/100,000, up 465% from 30 years ago, and has replaced liver cancer as the leading cause of death from malignant tumors. At present, death from lung cancer accounts for 22.7% of all deaths from malignant tumors, ranking the first cause of death from tumors in China. An article in the British Journal of Tuberculosis describes lung cancer as follows: “No other disease can be so feared and no other disease so neglected”. Over the past 100 years, lung cancer has gone from being an unnoticeable and “incidental” disease to the number one killer of cancer patients. According to statistics, approximately 1.4 million people die from lung cancer each year worldwide, one death every 30 seconds, more than the number of deaths from breast, colorectal and prostate cancers combined.