The prevention and treatment of diabetic nephropathy include the following 6 aspects: The first is changing lifestyle, including controlling weight, diabetic diet, quitting smoking, quitting alcohol, and appropriate exercise. Changing lifestyle is the foundation of blood sugar control and a key to improving various metabolic disorders. The second is blood sugar control. Strict blood sugar control is the most important means to prevent the occurrence and development of diabetes and diabetic nephropathy. Under normal kidney function, it is recommended to keep glycated hemoglobin below 6.2%. For patients with abnormal kidney function or elderly patients, it can be relaxed to 7%. The third is to reduce blood pressure and proteinuria. The most commonly used medications are ACE inhibitors and angiotensin receptor blockers. Once diabetic microalbuminuria appears, blood pressure should be controlled below 130/80 mmHg. The fourth is to restrict the intake of dietary protein, with a focus on animal protein, i.e., high-quality protein. Early stage protein intake should be controlled at 0.8-1g/kg; for patients who have developed renal failure, controlling protein intake at 0.6-0.8g/kg is more appropriate. The fifth involves controlling other factors, including a low-salt diet and treating hyperlipidemia. The sixth is the treatment of end-stage diabetic nephropathy. Since diabetic nephropathy patients frequently have cardiovascular complications and symptoms of uremia appear earlier, it is appropriate to start dialysis treatment early. (Please take medications under the guidance of a doctor.)