Lung cancer is a common tumor with causes related to smoking, air pollution and other factors. According to the NCCN guidelines (written by the world’s most authoritative top oncologists and widely recognized by oncologists worldwide for the treatment of various tumors), different stages of lung cancer must be treated differently to achieve the best outcome. Lung cancer is divided into 8 different disease stages: Ia, Ib, IIa, IIb, IIIa, IIIb, IVa, IVb, which are more complex and can often be simplified from the need for treatment as follows: 1. Early to mid-stage lung cancer (Ia, Ib, IIa, IIb, some IIIa); 2. Locally advanced lung cancer (some IIIa, IIIb) 3. Distant metastatic lung cancer. (IVa, IVb) Early to mid-stage lung cancer: The first choice of treatment is surgery. Some patients cannot be operated due to their age or poor heart, lung, liver and kidney functions, and they have to undergo concurrent radiotherapy (see later). Depending on the pathology after surgery, the next step of treatment will be decided. There is hope of cure. Locally advanced stage: It means the tumor is relatively large, or the tumor invades the surrounding important organs, such as large blood vessels, trachea esophagus, or there are lymph node metastasis, etc. The preferred treatment is concurrent radiotherapy. There is hope of cure. If patients in this stage are forced to have surgery, it will promote the development of tumor; if only chemotherapy is given, there is no hope of cure. Concurrent radiotherapy is a very effective tumor treatment method developed in recent years. In many tumors, the efficacy can be equal to that of surgery. The method is to administer chemotherapy at the same time as radiotherapy, with the aim of achieving synergy between radiotherapy and chemotherapy and increasing the effect of radiotherapy and chemotherapy, and the reported effect can provide more than 2 times. In developed countries of European and American medical level, concurrent radiotherapy and chemotherapy for locally advanced lung cancer is early a norm and the efficacy is the highest. Just as surgery requires skill, concurrent radiotherapy likewise requires a high degree of skill or technique to implement. This may be one of the reasons why this method cannot be widely used in China and why the standard of lung cancer treatment in China differs from that of the world. Distant metastatic lung cancer: It refers to lung cancer metastasis to brain, liver, bone, etc., or nausea and pleural effusion. Just having lymph node metastasis cannot be considered as distant metastasis, but locally advanced. Treatment is mainly based on chemotherapy, with no hope of cure. In China, one of the common misunderstandings in lung cancer treatment is the incorrect application or over-treatment of chemotherapy, especially for inoperable locally advanced lung cancer. It must be emphasized that without surgery or radiotherapy, chemotherapy alone cannot cure lung cancer, and on average, it only prolongs the survival time of patients for a few months, which I hope to draw the attention of patients and medical personnel.