WXSH0208

Primary objectives: 1) To evaluate the safety and tolerability of a single oral dose of WXSH0208 tablets in healthy adults under fasting conditions. 2) To evaluate the safety and tolerability of WXSH0208 tablets in healthy adults after multiple doses. Secondary objectives: 1) To evaluate the pharmacokinetic characteristics of prodrug WXSH0208 and parent drug WXSH0208-4 after a single oral dose of WXSH0208 tablets in healthy adults under fasting conditions. 2) To evaluate the pharmacokinetic characteristics of prodrug WXSH0208 and parent drug WXSH0208-4 after multiple oral doses of WXSH0208 tablets in healthy adults. 3) To evaluate the effect of food on the pharmacokinetic characteristics of prodrug WXSH0208 and parent drug WXSH0208-4 after oral administration of WXSH0208 tablets in healthy adults.