A Phase Ⅲ Study of HR19006 Injection in Postsurgical Parenteral Nutrition

Inclusion Criteria: 1. Able and willing to provide a written informed consent; 2. Elective operation of Gastrointestinal; 3. Male or female，aged 18-80 years inclusive; 4. Body Weight at least 40kg, Body mass index (BMI) 18.5-30 kg/m2 inclusive; 5. Nutrition Risk Screening (NRS2002) score at least 3 points. Exclusion Criteria: 1. Known hypersensitivity to egg-, soy-, and fish proteins or any of the ingredients; 2. Congenital amino acid metabolism abnormality; 3. Hypothyroidism or hyperthyroidism; 4. Significant abnormal values of clinical laboratory examination; 5. Uncompensated hemodynamical failure of any origin (hemorrhagic shock, myocardial infarction, cardiac failure); 6. General contraindications for infusion therapy such as acute pulmonary oedema, hyper-hydration and decompensated cardiac insufficiency; 7. Subjects with a history of mental system diseases and cognitive dysfunction; 8. Serious complications during or after operation; 9. Previous (\< 2 weeks) received treatment with intravenous nutrition; 10. Previous (\< 4 weeks) or ongoing treatment with growth hormone or corticosteroids; 11. Pregnant or nursing women; 12. No birth control during the specified period of time; 13. Participated in clinical trials of other drugs (received experimental drugs); 14. The investigators determined that other conditions were inappropriate for participation in this clinical trial.