The purpose of this study is to analyze the effects of GLP-1RA on blood glucose, body weight, glucose and lipid metabolism and fat distribution in overweight/obese patients with type 2 diabetes mellitus.

Specific research contents: To study the characteristics of glucose and lipid metabolism and fat distribution in overweight/obesity patients with type 2 diabetes mellitus; liraglutide/ semaglutide/ metformin will be applied to patients for one year, and the changes of lipid metabolism and fat distribution in overweight/obese patients with type 2 diabetes and the differences among the three groups will be analyzed before and after treatment. The metabolomic changes of overweight/obese patients with type 2 diabetes before and after medication and the differences among the three groups will be analyzed. Explore the correlation between visceral fat content, glucose and lipid metabolism, inflammatory factors and other biochemical indicators and metabolomics.