If the lung metastasis is relatively serious, the first treatment option is chemotherapy, which will be reviewed according to the specific condition. In clinical practice, it may be necessary to administer chemotherapy for 3 times in a row, monitor the decline of blood HCG, and perform CT examination to see if the metastases in the lungs have improved. After the lung metastases have improved and the blood HCG has dropped to normal, it is recommended to review the blood HCG periodically to understand the situation. Once the blood HCG has changed, CT examination should be done at any time to understand the situation of the lung, and it is clinically recommended to build up confidence and not to be nervous.