This is a single center, randomized, double-blind, dose escalation, placebo-controlled, first-in-humans phase 1 study to investigate the safety and tolerability of single and multiple escalating doses of ICP-022 in healthy volunteers. 40 healthy male participants (aged between 18 and 55 years of age inclusive) will be enrolled into Part 1 (single escalating dose administration) of this study, and additional 24 male subjects will be enrolled in Part 2 (multiple escalating dose administration). Part 1a consists of 5 cohorts of 8 participants each, while Part 2 includes 3 cohorts of 8 participants each.