The goal of this observational study is to learn whether patients undergoing mediastinal disease diagnosis and combined treatment with intrapacial ultrasound-guided mediastinal opening techniques have greater clinical benefit. The main questions it aims to answer are: * Whether the mediastinal ultrasound-guided mediastinal opening technique is more beneficial for the diagnosis of benign or malignant mediastinal diseases. * Does the mediastinal ultrasound-guided mediastinal opening technique benefit the patient by ablating mediastinal masses using freezing, laser, or other means. Mediastinal diseases were diagnosed by lymph node biopsy combined with NGS, ROSE and other techniques using transairway ultrasound-guided mediastinal opening technique. Ablation of mediastinal malignancies is performed using techniques such as freezing or laser. Transbronchial lung biopsy(TBLB) may also be performed when necessary. Researchers will compare the experimental group with mediastinal opening and the control group without mediastinal opening to see if Mediastinal open technique benefits patients.