A Phase I/IIa Clinical Study to Assess the Single and Multiple Ascending Doses of MDR-001 Tablets in Healthy Participants and Obese/ Overweight Participants

Inclusion Criteria: * Participants who are aged ≥ 18 and ≤ 55 years at the time of signing the informed consent; no gender restriction. * Participants with 27 ≤ body mass index (BMI) ≤ 45 kg/m2. * For male participants, a waist circumference ≥ 90 cm is required, while female participants ≥ 85 cm. Exclusion Criteria: * Participants with any condition that increases the risk of bleeding, such as hemorrhoids, acute gastritis, or gastric and duodenal ulcers. * Participants with personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia 2 (MEN2), or those with hereditary diseases that easily induce to medullary thyroid carcinoma. * Participants with a history of pancreatitis or symptomatic gallbladder disease. * Serum calcitonin \> ULN at screening. * Participants with systolic blood pressure \> 160 mmHg or diastolic blood pressure \> 100 mmHg at screening. * Participants with ALT \>2 × ULN and /or AST \> 2 × ULN at screening. * Participants whose fasting triglycerides \> 5.7 mmol/L, total cholesterol \> 7.75 mmol/L, low-density lipoprotein cholesterol \> 4.9 mmol/L at screening. * Participants with abnormal uric acid levels accompanied by clinical symptoms (those without clinical symptoms can be included). * Participants with fasting blood glucose levels \> 7 mmol/L. * Participants with creatinine clearance \< 60 mL/min at screening \[calculation formula: CLcr: (140 - age) × weight (kg) / \[72 × 0.0113 × Scr (μmol/L)\], × 0.85 for females\]. * Participants have experienced significant changes in diet or exercise habits or within ≥5% changes in body weight within 3 months prior to screening. * Participants with clinically significant ECG abnormality deemed unsuitable participation for study by the investigator; or with ECG QTcF values \> 450 ms for male participants or \> 470 ms for female participants.