diff --git a/rts-sim-testing-message b/rts-sim-testing-message
index 56e1948..e4c55ea 160000
--- a/rts-sim-testing-message
+++ b/rts-sim-testing-message
@@ -1 +1 @@
-Subproject commit 56e1948393aa51e0bf16d754292a211f348df161
+Subproject commit e4c55ea4b6f9f5f875d59fc5bba51fc21bc8ef97
diff --git a/src/graphics/train/Train.ts b/src/graphics/train/Train.ts
index c8a0be6..53981ab 100644
--- a/src/graphics/train/Train.ts
+++ b/src/graphics/train/Train.ts
@@ -637,9 +637,10 @@ export class Train extends JlGraphic {
     }
     const offset = this.states.headOffset / allLength; // 百分比偏移
     let offsetL = totalLength * offset;
+    // 0.01为保证浮点数计算误差
     const indexP = lengths.findIndex((l) => {
       offsetL -= l;
-      return offsetL <= 0;
+      return offsetL <= 0.001;
     });
     const startP = points[indexP];
     const endP = points[indexP + 1];