Stage 3A lung cancer is mainly confined to one side of the lung as well as hilar lymph nodes with metastasis, which can be divided into several cases: 1) the tumor is relatively large but not accompanied by lymph node metastasis; 2) the tumor is relatively large but lymph node metastasis of one side of the hilar lung has already appeared, but there is no mediastinal lymph node metastasis. Once there is mediastinal lymph node metastasis, the lymph node staging is N2, and then the lung cancer is stage 3B, turning into inoperable lung cancer. In the above 2 cases, some patients can be operated directly, and some other patients are better to do 2-3 times of neoadjuvant chemotherapy before considering surgery. But no matter what, stage 3A lung cancer is better than stage 3B, what you need to do is to catch up the treatment and communicate with your thoracic surgeon more to find the best treatment plan.