In order to meet the current needs of the rapid popularization of endoscopic sinus surgery in China, the development of a standard concerning the clinical typing and efficacy assessment of chronic sinusitis and nasal polyps will be conducive to accurate diagnosis, design of surgical plans and selection of surgical scope, more accurate evaluation of treatment effects and determination of prognosis, promote the healthy development of endoscopic sinus surgery in China, and facilitate academic exchanges at home and abroad. To this end, at the initiative of some experts, 20 domestic experts held a 4-day symposium in Jinan University, Guangzhou, China, from 26 to 29 December 1995. On the basis of serious analysis of the current situation in China, the experts fully exchanged and discussed their clinical practice experience, and at the same time, with reference to relevant domestic and foreign materials, formulated this clinical typing and efficacy assessment standard for chronic rhinosinusitis and nasal polyps (tentatively named “FESS-95” Guangzhou Standard), which is suitable for the specific situation in China. The first draft of the FESS-95 “Guangzhou standard”) for the reference of domestic colleagues. (1) Pre-operative detailed medical history, including time of illness, treatment and type of treatment (conservative or surgical treatment), treatment results and existing symptoms. (2) Pre-operative endoscopic nasal examination To understand the presence of inflammatory secretions in the nasal cavity (sinus orifice or nasal tract), the presence of nasal polyps, their size and number, and the anatomical variation of the nasal cavity (adhesions, deviated nasal septum, hyperplasia or enlargement of the middle or lower turbinate, etc.). (3) Preoperative CT scan of the nasal cavity and sinuses (coronal and horizontal) requires the patient to be in a prone position with the head hyperextended and the coronal tomographic baseline perpendicular to the upper line of the auditory orbit. In the horizontal position, the baseline is the upper line of the orbit. In order to carefully observe the relationship between bone and soft tissue of nasal cavity and sinus structure, a bone window with a window width of 1000HU, a window position of +90HU and a layer thickness of 2mm should be used. 12-16 layers should be scanned on average. 2, CT septal sinus typing criteria (1) honeycomb type: septal sinus hive dense number of numerous, bone septum thin; (2) hollow blister type: hive for a small number, fusion into a larger hollow blister, bone septum thin; (3) bone hyperplasia type: septal sinus hive more or less, bone septum significantly thickened, part of the interval overgrowth, hive fusion atresia. 3, chronic sinusitis, nasal polyps clinical typing criteria Type I: simple sinusitis (conservative treatment is ineffective). stage I: limited single sinus chronic inflammation. Stage II: anterior group sinusitis and/or wave to part of the posterior group septal sinus. Stage III: Whole group of sinusitis. Type II: Sinusitis with nasal polyps. Stage I: limited chronic inflammation of a single sinus with a single polyp. Stage II: anterior group of sinusitis and/or spread to part of the posterior group of septal sinuses with multiple polyps. Stage III: full group of sinusitis with multiple polyps.