1.Anterior nasoscopy: After the nasal mucosa is converged, the posterior nostril and nasopharynx can be seen through the anterior nasoscope, which can detect the cancer invading or adjacent to the nostril. 2.Indirect nasopharyngoscopy: It is a simple and practical method. All walls of the nasopharynx should be examined in turn, paying attention to the posterior wall of the nasopharyngeal apex and the pharyngeal fossa on both sides, and the corresponding parts on both sides should be observed in a controlled manner, and any asymmetrical submucosal elevation or isolated nodules on both sides should be brought to attention. 3, fiberoptic nasopharyngoscopy: fiberoptic nasopharyngoscopy can be performed first with 1% ephedrine solution to astringent nasal mucosa expansion of the nasal tract. Then use 1% dicaine solution to surface anesthetize the nasal passage, and then insert the fiberscope from the nasal cavity, observe on one side, and push forward until the nasopharyngeal cavity. This method is simple and the mirror is well fixed, but the observation of the posterior nostril and the anterior parietal wall is not satisfactory. 4.Neck biopsy: For cases where nasopharyngeal biopsy has failed to confirm the diagnosis, neck mass biopsy can be performed. Generally, it can be performed under local anesthesia, and the earliest hard and solid lymph nodes should be selected, and the whole lymph nodes should be removed with the envelope. If it is difficult to remove the biopsy, a wedge-shaped biopsy can be made at the mass, and the tissue must be cut to a certain depth and not squeezed. The field should not be sutured too tightly at the end of the operation.