The chest radiograph was examined on the first day after the radioactive particle implantation. Chest CT was repeated in the first, third, sixth, ninth and twelfth months after the operation, and a complete examination was done in the sixth and twelfth months, with the same items as before the operation. PETCT or SPETCT is recommended to detect and record the presence of metastatic cancer; in the second year, review every six months; and then annually for the rest of your life. Patients who have completed 4-6 cycles of postoperative adjuvant chemotherapy after particle implantation combined with chemotherapy have a complete examination. Tumor recurrence and metastases found during the follow-up period are treated promptly. Regular follow-up examinations should be continued for at least 5 years. Follow-up contents 1. Consultation and physical examination: Ask whether there is any change in symptoms before and after particle implantation, and whether new symptoms appear, especially in breathing, cough, hemoptysis, chest pain, pronunciation, pain, limb movement, etc. Physical examination especially the touching of superficial lymph nodes such as neck, supraclavicular and axillary, and the looking, touching and percussion of chest, etc. 2.Tumor index: CEA (carcinoembryonic antigen), SCC (squamous carcinoma-associated antigen), Fer (ferritin), Ca125, Ca153, etc. 3.CT of chest: to observe the change of tumor size after particle implantation, the presence of intrapulmonary metastasis, mediastinal lymph node metastasis or metastasis and invasion of pleura and ribs. 4.PET-CT or SET-CT: to observe the functional metastases. 5.Abdominal ultrasound: focus on liver, spleen, kidney, adrenal gland and abdominal lymph nodes. 6.If there is limited bone pain: especially if it is increasing or accompanied by pressure pain, there is a possibility of bone metastasis, ECT bone scan should be performed first to understand the bone marrow of the whole body, and MRI or CT examination should be performed on positive parts. 7. Other symptoms: If there is persistent headache or vomiting, or if there is unequal muscle strength of bilateral limbs or unstable walking, the possibility of intracranial metastasis should be considered and a neurological consultation should be requested. If the tumor continues to increase, it should be considered that the tumor is not sensitive to particle implantation or the PD is small, and it is recommended to implant particles again or choose other treatment means such as adjuvant external radiotherapy. Six months after particle implantation, the radiation dose of implanted particles has reached 80%, which is the most meaningful time to judge the therapeutic effect. 2.Early diagnosis and treatment of metastatic cancer, so that it can be effectively controlled. 3.Observation of recent and long-term complications. 4.Establishing a standardized follow-up model is significant for the implementation of multicenter and large sample clinical observation.