This is a randomized, double-blind, placebo-controlled single and multiple ascending dose and food effect study on PK. Subjects in the SAD and MAD study take the drug under fasting conditions, while those in the food effect (FE) study are required to take the drug under fasting or fed conditions according to the protocol.

Inclusion Criteria:

• Subjects who voluntarily take part in the study after being fully informed, sign a written informed consent form (ICF), and agree to follow procedures specified in the study protocol;
• Subjects who can take effective contraceptive measures from the start of screening to 6 months after the last dose of the IMP;
• Male and female subjects aged 18 to 45 years (inclusive);
• Male weight ≥ 50 kg, female weight ≥ 45 kg. Body mass index (BMI) = body weight (kg) / height2 (m2). BMI ranging from 19 to 26 kg/m2 (inclusive);
• Subjects without medical history of clinically significant respiratory, circulatory, digestive, urinary, hematological, endocrine, nervous system diseases, metabolic abnormalities or infections, etc.

Exclusion Criteria:

• More than 5 cigarettes per day on average within 3 months before screening;
• Subjects with a clinically significant history of drug allergy or specific allergic diseases (asthma, urticaria) or known allergy to the IMP or its excipients;
• History of alcohol abuse (consuming an average of 14 units of alcohol per week within 3 months prior to screening: 1 unit = 285 mL of beer, or 25 mL of spirits, or 100 mL of wine);
• Subjects with a history of substance or drug abuse or a positive urine drug screening;
• Blood donation or massive blood loss (>450 mL) within 3 months before screening.