diff --git a/src/graphics/platform/Platform.ts b/src/graphics/platform/Platform.ts
index a88626b..558d4a0 100644
--- a/src/graphics/platform/Platform.ts
+++ b/src/graphics/platform/Platform.ts
@@ -143,9 +143,8 @@ class smallDoorGraphic extends Container {
     this.addChild(this.labelGraphic);
   }
   draw(data: IPlatformData, stateData: IPlatformState, i: number): void {
-    const sonDoorAmount = data?.sonDoorAmount || 30;
     const start =
-      (-platformConsts.smallDoorWidth * sonDoorAmount) / 2 +
+      (-platformConsts.smallDoorWidth * data.sonDoorAmount) / 2 +
       platformConsts.smallDoorWidth * i;
     const smallDoorGraphic = this.smallDoorGraphic;
     const lineColor = PlatformColorEnum.doorGreen;
@@ -158,7 +157,7 @@ class smallDoorGraphic extends Container {
       .moveTo(start, 0)
       .lineTo(start + platformConsts.smallDoorWidth - 3, 0);
     if (direction == 'down') {
-      this.labelGraphic.text = sonDoorAmount - i;
+      this.labelGraphic.text = data.sonDoorAmount - i;
     } else {
       this.labelGraphic.text = i + 1;
     }
@@ -175,8 +174,7 @@ export class doorGraphic extends Container {
     super();
   }
   draw(data: IPlatformData, stateData: IPlatformState): void {
-    const sonDoorAmount = data?.sonDoorAmount || 30;
-    for (let i = 0; i < sonDoorAmount; i++) {
+    for (let i = 0; i < data.sonDoorAmount; i++) {
       const smallDoor = new smallDoorGraphic();
       smallDoor.draw(data, stateData, i);
       this.addChild(smallDoor);
@@ -429,6 +427,7 @@ export class Platform extends JlGraphic {
     return this.datas.index + '';
   }
   doRepaint(): void {
+    this.datas.sonDoorAmount = this.datas?.sonDoorAmount || 30;
     this.doorGraphic.clear();
     if (this.datas.hasdoor) {
       this.doorGraphic.draw(this.datas, this.states);