Stage II nephropathy usually refers to a graded degree of progression of chronic kidney disease, in which the patient has a glomerular filtration rate of between 60 and 89 ml/(min-1.73m²), the duration of the disease is more than 3 months, and there are alterations in the morphology or function of the kidneys, such as hematuria and proteinuria. Chronic kidney disease is a structural or functional abnormality of the kidneys for ≥3 months from various causes, including the presence of markers of renal injury (albuminuria, abnormal urinary sediment, tubular-related lesions, histologic abnormalities, and imaging abnormalities) or a history of renal transplantation, with or without a decrease in glomerular filtration rate; or unexplained decrease in glomerular filtration rate for ≥3 months. Chronic kidney disease is currently categorized into 5 stages based on glomerular filtration rate. Stage 1: Glomerular filtration rate ≥90 ml/(min-1.73m²). Stage 2: Glomerular filtration rate of 60-89ml/(min-1.73m²). Stage 3: Glomerular filtration rate is 30~59ml/(min-1.73m²). Stage 4: Glomerular filtration rate is 15~29ml/(min-1.73m²). Stage 5: Glomerular filtration rate is <15ml/(min-1.73m²). Patients with chronic kidney disease are recommended to go to regular hospitals in time and receive standardized treatment under the guidance of doctors.