diff --git a/src/time/mod.rs b/src/time/mod.rs
index e721c6a..056ec36 100644
--- a/src/time/mod.rs
+++ b/src/time/mod.rs
@@ -1,4 +1,4 @@
-use chrono::{DateTime, Datelike, Duration, FixedOffset, NaiveDate, NaiveDateTime, Utc};
+use chrono::{DateTime, Datelike, Duration, FixedOffset, NaiveDate, NaiveDateTime, TimeZone, Utc};
 
 /// 获取一个类型为`chrono::DateTime<chrono::FixedOffset>`类型的当前日期时间的实例。时间时区将自动被设置为东八区。
 pub fn now_asia_shanghai() -> DateTime<FixedOffset> {
@@ -7,7 +7,7 @@ pub fn now_asia_shanghai() -> DateTime<FixedOffset> {
 }
 
 /// 将一个类型为`chrono::DateTime<chrono::Utc>`类型的日期时间转换到指定时区的时间实例。
-pub fn shift_tz(datetime: DateTime<Utc>, zone: i64) -> DateTime<FixedOffset> {
+pub fn shift_tz<T: TimeZone>(datetime: DateTime<T>, zone: i64) -> DateTime<FixedOffset> {
     if zone.is_positive() {
         datetime.with_timezone(
             &FixedOffset::east_opt(Duration::hours(zone.abs()).num_seconds() as i32).unwrap(),
@@ -20,7 +20,7 @@ pub fn shift_tz(datetime: DateTime<Utc>, zone: i64) -> DateTime<FixedOffset> {
 }
 
 /// 将一个类型为`chrono::DateTime<chrono::Utc>`类型的日期时间转换到东八区的时间实例。
-pub fn shift_to_asia_shanghai(datetime: DateTime<Utc>) -> DateTime<FixedOffset> {
+pub fn shift_to_asia_shanghai<T: TimeZone>(datetime: DateTime<T>) -> DateTime<FixedOffset> {
     shift_tz(datetime, 8)
 }