I have been asked by many people how to not produce complications when they have diabetes, I said to do the following: 1, to control blood sugar, blood pressure, blood lipids, uric acid; these indicators are controlled at or near normal, complications are less likely to arise; 2, control the blood viscosity: older people, blood viscosity tends to be high, blood tends to flow slowly, so it is easy to block large blood vessels or microvascular, so, to use some anticoagulant drugs; 3, eat more fibrous food to promote defecation and detoxification; eat more green leafy vegetables; 4, monitor the condition of large blood vessels such as cardiovascular, cerebrovascular and lower limb vessels, as well as microvascular such as fundus and kidney, for timely detection and early prevention.