A Study of Bupivacaine Liposome Injection in Local Analgesia of Pediatric Patients

Inclusion Criteria: 1. Subjects and guardians are willing to sign the informed consent. 2. Subjects undergoing orthopedic surgery under general anesthesia with expected cumulative incision length≥3cm. 3. 6 years old ≤ age ≤17 years old , Male or female. 4. ASA Physical Status Classification I-III. Exclusion Criteria: 1. Subjects received liposomal bupivacaine or bupivacaine hydrochloride within the past 30 days; 2. Subjects with a history of immunodeficiency diseases (such as congenital immunodeficiency disease, AIDS or malignant tumors) or received immunosuppressants within 30 days; 3. Subjects with comorbid mental diseases (such as schizophrenia, depression, etc.) or difficult to communicate; 4. Subjects with a history of chronic pain or visceral pain; 5. Subjects with abnormal liver and kidney function; 6. Subjects with clinically significant abnormal heart rate or rhythm; 7. Subjects who are participating or planning to participate in any interventional clinical trial; 8. The investigators determined that other conditions were inappropriate for participation in this clinical trial.