HS-10220

To evaluate the tolerability and safety of a single oral administration of HS-10220 in healthy subjects; Secondary objectives: 1. To investigate the pharmacokinetic characteristics of a single oral administration of HS-10220 in healthy subjects; 2. To preliminarily explore the pharmacodynamic characteristics (dynamic 24-hour intragastric pH monitoring, gastrin and pepsinogen I/II) of a single oral administration of HS-10220 in healthy subjects;