There is no concept of glomerulonephritis stage 3, only chronic kidney disease stage 3. Chronic kidney disease stage 3 usually has a poorer prognosis, with most patients experiencing a gradual decline in renal function, and some patients eventually progressing to end-stage renal disease. Stage 3 of chronic kidney disease is divided into stage 3a and stage 3b. stage 3a: GFR is mildly to moderately reduced, 45-59ml/(min-1.73m²); stage 3b: GFR is moderately to severely reduced, 30-44ml/(min-1.73m²); at this time, patients with kidney damage is relatively large, and can not be completely restored to normal even after active drug treatment. Chronic kidney disease stage 3 patients need to go to the hospital in time, need to clarify the cause of the disease under the guidance of the doctor, early symptomatic treatment, although it can not be completely cured, but after active drug treatment, can greatly slow down the deterioration of the kidneys and delay the arrival of end-stage renal disease time.