diff --git a/im-center-server/src/main/java/cn/axzo/im/group/message/timeline/Timeline.java b/im-center-server/src/main/java/cn/axzo/im/group/message/timeline/Timeline.java
index 433473e..532a19d 100644
--- a/im-center-server/src/main/java/cn/axzo/im/group/message/timeline/Timeline.java
+++ b/im-center-server/src/main/java/cn/axzo/im/group/message/timeline/Timeline.java
@@ -20,7 +20,7 @@ public class Timeline {
     public Timeline(Long beginMs, Long endMs) {
         BizAssertions.assertTrue(beginMs <= endMs, "beginMs must be less than or equal to endMs");
         nodes = new LinkedList<>();
-        prepend(split(beginMs, endMs, splitCount));
+        prepend(split(beginMs, endMs));
     }
 
     private void prepend(List<TimeNode> nodes) {
@@ -34,7 +34,7 @@ public class Timeline {
         BizAssertions.assertTrue(node.isSplittable(), "node is not splittable");
         nodes.removeFirst();
         splitCount *= 2;
-        prepend(split(node.getBeginMs(), node.getEndMs(), splitCount));
+        prepend(split(node.getBeginMs(), node.getEndMs()));
         return peek();
     }
 
@@ -51,7 +51,7 @@ public class Timeline {
         return nodes.peek();
     }
 
-    private List<TimeNode> split(Long beginMs, Long endMs, int splitCount) {
+    private List<TimeNode> split(Long beginMs, Long endMs) {
         BizAssertions.assertTrue(beginMs <= endMs, "beginMs must be less than or equal to endMs");
         List<TimeNode> nodes = new ArrayList<>();
         long totalDuration = endMs - beginMs;