1. Genetic factors: Both type 2 diabetes and type 1 diabetes have a familial onset, so it is likely to be related to genetic inheritance. This genetic trait is more pronounced in type 2 diabetes than in type 1 diabetes. For example, if one of the twins has type 1 diabetes, the other has a 40% chance of developing the disease; however, if it is type 2 diabetes, the other has a 70% chance of developing type 2 diabetes. Lu Yingli, Department of Endocrinology, Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine 2. Lifestyle: Eating high-calorie foods and reducing exercise can also cause diabetes. Most modern Chinese have significantly less physical activity compared to their ancestors. 3, obesity: an important factor of type 2 diabetes may be obesity. Genetic reasons can cause obesity, the same can also cause type 2 diabetes. The body center type obese patient’s excess fat concentrated in the abdomen, they are more prone to type 2 diabetes than those whose fat is concentrated in the buttocks and thighs. 4, age: age is one of the main factors in the onset of type 2 diabetes, half of the type 2 diabetes patients more than 55 years of age after the onset. Patients of advanced age are also prone to diabetes related to the fact that older people are prone to being overweight. 5, environmental pollution and social pressure.