The primary objective is to evaluate the analgesic efficacy of the combination of SHR8554 injection and SHR0410 injection compared with SHR8554 injection in patients with acute postoperative pain following abdominal surgery

Inclusion Criteria:

1. Able and willing to provide a written informed consent
2. Subjects requiring elective general anesthesia abdominal surgery
3. Conform to the ASA Physical Status Classification

Exclusion Criteria:

1. Subjects with a history of difficult airway
2. Subjects with a history of reflux esophagitis
3. Subjects with a history of mental illness
4. Subjects with poor blood pressure control
5. Random blood glucose ≥11.1mmol/L
6. Subjects with abnormal liver function
7. allergies to opioids and other medications that may be used during the trial
8. The investigators determined that other conditions were inappropriate for participation in this clinical trial