diff --git a/src/main/java/com/chuangzhou/vivid2D/render/model/data/ModelData.java b/src/main/java/com/chuangzhou/vivid2D/render/model/data/ModelData.java
index cc0aa51..f542cbf 100644
--- a/src/main/java/com/chuangzhou/vivid2D/render/model/data/ModelData.java
+++ b/src/main/java/com/chuangzhou/vivid2D/render/model/data/ModelData.java
@@ -323,19 +323,23 @@ public class ModelData implements Serializable {
     private void serializeMeshes(Model2D model) {
         meshes.clear();
 
-        // 首先序列化模型级别的所有网格
+        // 使用Set记录已序列化的网格名称，避免重复
+        Set<String> serializedMeshNames = new HashSet<>();
+
+        // 先序列化模型级别的网格
         for (Mesh2D mesh : model.getMeshes()) {
-            if (!meshExists(mesh.getName())) {
+            if (!serializedMeshNames.contains(mesh.getName())) {
                 meshes.add(new MeshData(mesh));
+                serializedMeshNames.add(mesh.getName());
             }
         }
 
-        // 然后序列化所有部件中的网格
+        // 再序列化部件中的网格（去重）
         for (ModelPart part : model.getParts()) {
             for (Mesh2D mesh : part.getMeshes()) {
-                // 检查是否已经序列化过（避免重复）
-                if (!meshExists(mesh.getName())) {
+                if (!serializedMeshNames.contains(mesh.getName())) {
                     meshes.add(new MeshData(mesh));
+                    serializedMeshNames.add(mesh.getName());
                 }
             }
         }
@@ -502,6 +506,12 @@ public class ModelData implements Serializable {
         for (PartData partData : parts) {
             ModelPart part = partData.toModelPart(meshMap);
             partMap.put(part.getName(), part);
+
+            for (Mesh2D mesh : part.getMeshes()) {
+                if (!model.getMeshes().contains(mesh)) {
+                    model.addMesh(mesh);
+                }
+            }
         }
 
         // 2. 建立父子关系
diff --git a/src/main/java/com/chuangzhou/vivid2D/test/ModelLayerPanelTest.java b/src/main/java/com/chuangzhou/vivid2D/test/ModelLayerPanelTest.java
index fc8837d..119b24a 100644
--- a/src/main/java/com/chuangzhou/vivid2D/test/ModelLayerPanelTest.java
+++ b/src/main/java/com/chuangzhou/vivid2D/test/ModelLayerPanelTest.java
@@ -142,6 +142,7 @@ public class ModelLayerPanelTest {
                         renderPanel.dispose();
                     } catch (Throwable ignored) {
                     }
+                    model.saveToFile("C:\\Users\\Administrator\\Desktop\\testing.model");
                     System.exit(0);
                 }
             });
diff --git a/src/main/java/com/chuangzhou/vivid2D/test/ModelLoadTest.java b/src/main/java/com/chuangzhou/vivid2D/test/ModelLoadTest.java
index f406441..f58ce27 100644
--- a/src/main/java/com/chuangzhou/vivid2D/test/ModelLoadTest.java
+++ b/src/main/java/com/chuangzhou/vivid2D/test/ModelLoadTest.java
@@ -36,7 +36,7 @@ public class ModelLoadTest {
     private boolean enableWireframe = false;
 
     // 要加载的 model 文件路径（请根据实际保存位置修改）
-    private static final String MODEL_PATH = "C:\\Users\\Administrator\\Desktop\\trump_texture.model";
+    private static final String MODEL_PATH = "C:\\Users\\Administrator\\Desktop\\testing.model";
 
     public static void main(String[] args) {
         new ModelLoadTest().run();
@@ -318,20 +318,6 @@ public class ModelLoadTest {
                         } catch (Throwable ignored) {
                         }
                     }
-
-                    // 如果 parts 不为空，尝试把第一个 part 放到窗口中心（如果有 setPosition）
-                    if (!parts.isEmpty()) {
-                        Object first = parts.get(0);
-                        try {
-                            Method setPosition = tryGetMethod(first.getClass(), "setPosition", float.class, float.class);
-                            if (setPosition != null) {
-                                setPosition.invoke(first, (float) WINDOW_WIDTH / 2f, (float) WINDOW_HEIGHT / 2f);
-                                System.out.println("Moved first part to window center.");
-                            }
-                        } catch (Throwable t) {
-                            // ignore
-                        }
-                    }
                 }
             }