Diabetes identification criteria are as follows: First, if there are typical symptoms of diabetes, such as having excessive drinking, excessive urination, excessive eating, and unexplained weight loss, plus fasting intravenous blood glucose greater than or equal to 7.0 mmol/L or random intravenous blood glucose greater than or equal to 11.1 mmol/L, diabetes can be diagnosed. Secondly, if the 2 fasting blood glucose is greater than or equal to 7.0mmol/L, it can also be diagnosed as diabetes mellitus. Thirdly, if 2 times postprandial 2 hours blood glucose is greater than or equal to 11.1mmol/L, it can also be diagnosed as diabetes.