Efficacy of Metformin in Preventing Diabetes in China

Metformin tablets will be administrated in the experimental arm.

"Standard lifestyle advice will be united for all subjects by providing special booklet.~* All participants will receive 20-30 minutes individual or group session with assigned nurse addressing the harm of prediabetes and the importance of a healthy lifestyle for preventing Diabetes.~* The amount of energy intake of the participants will be calculated based on the ideal body weight and physical activity levels. The sample recipe will be explained by the nurse and provided in the diet instruction.~* Moderate intensity physical activity (150 minutes per week) is recommended.~* Smoking cessation is encouraged for the smoker.~* Excessive alcohol intake is encouraged to avoid."