Exclusion criteria:
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1. Patients with type 1 diabetes; patients with latent autoimmune diabetes, malignant tumor or other autoimmune diseases in adults;
2. In type 2 diabetic patients, fasting blood glucose was more than 11.1mmol/l;
3. Patients who used insulin continuously for more than 2 weeks in the past 3 months, or need insulin treatment at present;
4. Patients who have been taking other drugs for reducing blood sugar and regulating blood fat that have influence on liver within 3 months or are currently taking orally;
5. Patients taking GLP-1 antidiabetic drugs within 3 months or at present;
6. Acute and chronic complications of diabetes, including diabetic ketoacidosis, diabetic hyperosmotic nonketotic coma, hypoglycemic coma or severe unconscious hypoglycemia;
7. Patients with severe gastrointestinal diseases, such as intestinal obstruction, intestinal ulcer or obvious digestive and absorption dysfunction;
8. Patients with heart failure, unstable angina, serious arrhythmia, and myocardial infarction in the past 12 months; those with SBP > 180mmhg or DBP > 100mmhg;
9. Patients with history of active liver disease (excluding nonalcoholic fatty liver), including chronic active hepatitis B or C (assessed by history), primary biliary cirrhosis or symptomatic gallbladder disease, hepatolenticular degeneration, drug-induced liver disease, etc.; child Pugh grade C of liver function;
10. Patients with renal disease or clinical history of renal insufficiency, whose serum creatinine is more than 1.5mg/dl (132.6 μ mol / L);
11. Patients with other endocrine system diseases, such as hyperthyroidism and cortisol;
12. Patients who are suffering from serious trauma, serious infection or undergoing surgery, as well as those who are treated but not fully recovered;
13. Objects with mental illness, drug or other substance abuse or alcohol abuse;
14. Patients undergoing steroid hormone therapy or cancer therapy;
15. Patients with allergic constitution or allergic to drugs used in this study;
16. Pregnant and lactating women, women of childbearing age who did not take effective contraceptive measures, or those who planned to be pregnant during the trial, and those whose urine HCG test results were positive;
17. Participants in other drug trials within 3 months;
18. Patients whose families do not agree to participate in the trial.
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