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.