The purpose of this study is to evaluate the efficacy and safety of Remimazolam Tosilate for Injection for sedation in Upper Gastrointestinal Endoscopy

Inclusion Criteria:

1. patients or their guardians are able to provide a written informed consent
2. participants undergo upper gastrointestinal endoscopy
3. ≥18 years old, male or female
4. 18 kg/m2≤bmi≤30kg/m2

Exclusion Criteria:

1. Subjects to be intubated (including laryngeal mask placement);
2. Complex endoscopic diagnosis and treatment operations are required;
3. Severe cardiovascular disease within 6 months prior to signing the ICF;
4. Heart rate < 50 beats/min during screening period;
5. Subjects with poor blood pressure control during screening;
6. Severe arrhythmias or heart disease; the circulatory system is unstable;
7. Subjects with a history of severe cardiovascular disease, or cerebrovascular disease, or neurological disease, or mental illness
8. Subjects with a history of drug abuse;
9. Abnormal values of the laboratory examination;
10. Allergic to relevant drugs ingredient or component;
11. Pregnant or nursing women;
12. Subjects who has participated in clinical trials of other interventions recently;
13. Other conditions deemed unsuitable to be included.