Different people have different blood sugar control standards, in line with this principle, China has set the blood sugar control standard for adult diabetic patients at 4.4-6.1mmol/L fasting and 4.4-8.0mmol/L 2 hours after meal, while glycated hemoglobin requires <6.5%, fasting blood sugar not more than 6.1mmol/L and postprandial blood sugar not more than 8.0mmol/L. This standard is mainly This standard is mainly suitable for ordinary adult diabetic patients, especially type 2 diabetic people. In fact, the blood sugar control index of many people is different from the general population, such as adolescents, pregnant women and the elderly have their own control goals, as follows: 1. Children with diabetes: because children's diet is not likely to be very regular, the daily activity changes a lot, and lack of self-knowledge of hypoglycemia and means to cope with it, if they pursue the blood sugar standard too much, they are not only prone to hypoglycemia, but also may be affected by insufficient nutritional intake. The child's growth and development may also be affected by insufficient nutritional intake. Therefore, the blood sugar control of children with diabetes should be appropriately relaxed, and the target of pre-meal control including fasting is 5.0-10.0mmol/L. Glycosylated hemoglobin less than 7.5% is ideal, and between 7.5%-9.0% is the general control. 2. Pregnant women with diabetes: high blood sugar can have adverse effects on pregnant women and fetuses, so the blood sugar of gestational diabetes must be strictly controlled so that Therefore, the blood sugar of gestational diabetes must be strictly controlled so that it can be maintained at the normal level as much as possible. Pre-meal and bedtime blood glucose should not exceed 5.5mmol/L, 1 hour after meal should not exceed 7.8mmol/L, 2 hours after meal blood glucose should not exceed 6.7mmol/L. If it exceeds this standard, timely intervention is needed; 3. Elderly diabetic patients: Compared with adults, elderly diabetic patients have a higher risk of hypoglycemia and are prone to asymptomatic hypoglycemia, patients can fall into coma without obvious hypoglycemic aura. In addition, elderly diabetic patients are prone to complications of atherosclerosis and cardiovascular pathology, and once hypoglycemia occurs, it can induce stroke or myocardial infarction, which are very dangerous. Therefore, the standard for elderly patients is also relatively more lenient than that for adults, as long as fasting blood sugar does not exceed 8.0mmol/L and 2 hours after meal blood sugar does not exceed 12mmol/L. 4. For patients with serious chronic complications, patients with large blood sugar fluctuations and frequent hypoglycemia: such as brittle diabetes or diabetes patients who are bedridden for a long time and cannot take care of themselves, or diabetes patients with advanced cancer The target of their blood sugar control should also be appropriately relaxed, as long as fasting blood sugar does not exceed 8.mmol/L and 2 hours after meal does not exceed 11 mmol/L.