The study will set 2.5mg, 5mg, 10mg, 20mg, 40mg, 60mg, 80mg and 100mg, a total of 8 dose groups. Qualified subjects were enrolled in site at D-1 ( 1 day before administration ) and randomized.The subjects should fast for at least 10 hours before medication administration, with no restrictions on water intake. The subjects will be required to orally take LY03020 or a placebo on an empty stomach upon waking on D1 (the day of medication administration). From D1 to D7, they will undergo safety assessments and PK biological sample collection.
