diff --git a/server-rs/crates/module-runtime/src/membership/cycle.rs b/server-rs/crates/module-runtime/src/membership/cycle.rs
index 43e76b5e4..4ac059a73 100644
--- a/server-rs/crates/module-runtime/src/membership/cycle.rs
+++ b/server-rs/crates/module-runtime/src/membership/cycle.rs
@@ -20,7 +20,7 @@ pub fn beijing_local_date_parts(micros: i64) -> (i32, u8, u8, i64) {
     (year, month, day, time_of_day_micros)
 }
 
-/// 北京时间本地年月日 + 当日已过微秒 → UTC 微秒时间戳；本地日期不存在则返回原值。
+/// 北京时间本地年月日 + 当日已过微秒 → UTC 微秒时间戳；本地日期不存在时返回 0。
 pub fn beijing_local_micros(year: i32, month: u8, day: u8, time_of_day_micros: i64) -> i64 {
     if !(1..=12).contains(&month) || day == 0 || day > days_in_month(year, month) {
         return 0;