AI-assisted Multi-domain Lifestyle Versus Tirzepatide for Weight Loss Maintenance in Adults With Type 2 Diabetes (AIM-MAINTAIN)

Inclusion Criteria: 1. Male or female participants aged 18 to 65 years at the time of signing informed consent; 2. Body Mass Index (BMI) ≥27.0 kg/m²; 3. Type 2 diabetes mellitus diagnosed by physicians within the past 5 years prior to screening. 4. Voluntary participation and provide written informed consent. Exclusion Criteria: 1. History of type 1 diabetes mellitus or other types of diabetes, or treatment with insulin. 2. History of obesity attributable to endocrine disorders or monogenic mutations. 3. A self-reported change in body weight ≥5.0% within 3 months prior to the day of screening. 4. Use of medications or products causing weight changes or affecting weight assessment within 3 months prior to the day of screening; 5. History of major adverse cardiovascular or cerebrovascular events within 6 months before screening (e.g., angina, myocardial infarction, arrhythmia, stroke, intracranial hemorrhage). 6. History of acute or chronic pancreatitis, pancreatic injury, or other high-risk factors for pancreatitis. 7. History of cancers (except for localized basal cell carcinoma, adenocarcinoma in situ of cervix or prostate carcinoma in situ); personal or family history of medullary thyroid carcinoma (MTC) or type 2 multiple endocrine neoplasia syndrome (MEN2), or history of thyroid nodules (category IV or higher). 8. History of organ transplantation, congenital or acquired immunodeficiency disorders. 9. History of schizophrenia or major depressive disorder or other severe psychiatric disorders. 10. Poorly controlled hypertension at screening (systolic blood pressure (SBP) ≥160 mmHg and/or diastolic blood pressure (DBP) ≥100 mmHg despite at least 4 weeks of conventional antihypertensive therapy). 11. History of clinically significant gastric emptying abnormalities, or history of severe chronic gastrointestinal disease, or history of diabetic gastroparesis, or long-term use of drugs that directly affect gastrointestinal motility, or history of gastrointestinal surgery. 12. Those who are known to be allergic to any component of GLP-1 receptor agonists drugs, or have more than two allergies, or be allergic to soy, dairy, or similar foods. 13. Laboratory evaluation at screening meet any of the following criteria: * Calcitonin ≥50 pg/mL; * Thyroid stimulating hormone (TSH) \>6.0 or \<0.4 mIU/L; * Fasting C-peptide \<0.81 ng/mL; * Aspartate aminotransferase (AST) or Alanine aminotransferase (ALT) \>2.5 × upper limit of normal (ULN) or total bilirubin (TBIL) \>2.5 × ULN (except Gilbert's syndrome with conjugated bilirubin \<35%); * Triglycerides ≥5.7 mmol/L; * Serum amylase \>2.5 × ULN; * eGFR \<30 mL/min/1.73m² 14. History of uncontrolled and potentially unstable proliferative retinopathy or maculopathy within 1 year prior to screening, or history of diabetic ketoacidosis, diabetic non-ketotic hyperosmolar coma, or severe metabolic disturbances with neurological and psychiatric disorders. 15. History of clinically significant anemia, or epilepsy, or syncope or cardiac conditions (e.g. cardiac arrest, arrhythmias, atrioventricular block, structural heart disease, torsades de pointes). 16. Patients with active bacterial, viral, or fungal infections requiring hospitalization or antibiotic treatment. 17. History of infectious diseases such as human immunodeficiency virus (HIV), syphilis, or active hepatitis. 18. Female patients who are pregnant, lactating, or planning to become pregnant within the next two years. 19. Participation in other clinical trial within 3 months before screening or currently enrolled in other clinical trial study. 20. History of drug abuse or alcohol dependence within 6 months before screening. 21. Any other reasons that researchers deem to unsuitable for participation in this study.