diff --git a/bodies/body.py b/bodies/body.py
index abdbad814d76c0c85c5cf80f2ec63acf662961b3..3f20dd4a359ec400ba82f818b138c08d0ac3a335 100644
--- a/bodies/body.py
+++ b/bodies/body.py
@@ -371,12 +371,15 @@ class Body(metaclass=ABCMeta):
                 except Exception as e:
                     err_msg = f"{json_file} 格式错误：" + str(e)
                     raise Exception(err_msg)
+                is_fixed_star = False
                 if "is_fixed_star" in body_data:
                     if body_data["is_fixed_star"]:
-                        body_data.pop("is_fixed_star")
-                        body = FixedStar(**body_data)
-                else:
+                        is_fixed_star = True
+                if is_fixed_star:
+                    body_data.pop("is_fixed_star")
                     body = FixedStar(**body_data)
+                else:
+                    body = Body(**body_data)
                 bodies.append(body)
             if "params" in json_data:
                 params = json_data["params"]
diff --git a/data/gravity_slingshot.json b/data/gravity_slingshot.json
index 7cce92b9a972cfdbd646eb2d1757bd65e96c59a7..b0f9ffaf65f20f024fab127e8d445a4cb4978ea7 100644
--- a/data/gravity_slingshot.json
+++ b/data/gravity_slingshot.json
@@ -24,7 +24,12 @@
       "distance_scale": 1.0,
       "rotation_speed": 0.613,
       "ignore_mass": false,
-      "is_fixed_star": true
+      "is_fixed_star": true,
+      "trail_color": [
+        170,
+        98,
+        25
+      ]
     },
     {
       "name": "地球",
@@ -50,15 +55,22 @@
       "distance_scale": 1.0,
       "rotation_speed": 15,
       "ignore_mass": false,
-      "is_fixed_star": false
+      "is_fixed_star": false,
+      "trail_color": [
+        1,
+        89,
+        162
+      ]
     }
   ],
   "params": {
     "dt": 2592000,
     "position": [
       0,
-      149597870.7,
-      -448793612.09999996
-    ]
+      74798935.35,
+      -598391482.8
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file
diff --git a/data/sun.json b/data/sun.json
index e1b503f3e3d2c65c8299c07d90d9356afcc8331f..2c8e66fc79c25b090d88830686a0c9836fce60e3 100644
--- a/data/sun.json
+++ b/data/sun.json
@@ -32,7 +32,7 @@
     "position": [
       0,
       149597870.7,
-      -448793612.09999996
+      -598391482.8
     ]
   }
 }
\ No newline at end of file
diff --git a/data/sun_earth.json b/data/sun_earth.json
index a1e15ed6a04771879739dc16f8f83df7f948e11a..c75e11365b92a80ec5761344f84064d2e8fe5af5 100644
--- a/data/sun_earth.json
+++ b/data/sun_earth.json
@@ -24,7 +24,12 @@
       "distance_scale": 1.0,
       "rotation_speed": 0.613,
       "ignore_mass": false,
-      "is_fixed_star": true
+      "is_fixed_star": true,
+      "trail_color": [
+        170,
+        98,
+        25
+      ]
     },
     {
       "name": "地球",
@@ -50,7 +55,12 @@
       "distance_scale": 1,
       "rotation_speed": 15,
       "ignore_mass": false,
-      "is_fixed_star": false
+      "is_fixed_star": false,
+      "trail_color": [
+        1,
+        89,
+        162
+      ]
     }
   ],
   "params": {
@@ -58,7 +68,9 @@
     "position": [
       0,
       149597870.7,
-      -448793612.09999996
-    ]
+      -598391482.8
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file
diff --git a/data/tri_bodies_perfect_01.json b/data/tri_bodies_perfect_01.json
index 7750c2bb6dac43346085482361f17c9bb8b8b127..fe7bdf2686f1b33c2993d1d9e955ef88f572f616 100644
--- a/data/tri_bodies_perfect_01.json
+++ b/data/tri_bodies_perfect_01.json
@@ -117,6 +117,8 @@
       0,
       149597870.7,
       -1495978707.0
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file
diff --git a/data/tri_bodies_perfect_02.json b/data/tri_bodies_perfect_02.json
index 586b9ac63f8e8abe199f8e3c6143bcead483f3d0..fb8348623a29aa6dc6f84a4265adb2f3b87fceac 100644
--- a/data/tri_bodies_perfect_02.json
+++ b/data/tri_bodies_perfect_02.json
@@ -94,6 +94,8 @@
       0,
       149597870.7,
       -1495978707.0
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file
diff --git a/data/tri_bodies_perfect_03.json b/data/tri_bodies_perfect_03.json
index c99e421a9705e0382df82ad97a3f5f10fa88bf6a..b56337e4261c6d7734986074c0c8dbd3756a3c02 100644
--- a/data/tri_bodies_perfect_03.json
+++ b/data/tri_bodies_perfect_03.json
@@ -94,6 +94,8 @@
       0,
       149597870.7,
       -1495978707.0
-    ]
+    ],
+    "show_trail": true,
+    "show_name": false
   }
 }
\ No newline at end of file
diff --git a/sim_scenes/ursina_json_sim.py b/sim_scenes/ursina_json_sim.py
index 879099d1ebe807d04da36039319cd010e7aa25c1..d965f082beb56138cc308f7389c9bc2665e658b2 100644
--- a/sim_scenes/ursina_json_sim.py
+++ b/sim_scenes/ursina_json_sim.py
@@ -33,7 +33,7 @@ if __name__ == '__main__':
 
     dt = params["dt"] if "dt" in params else SECONDS_PER_YEAR
     position = params["position"] if "position" in params else (0, 0, 0)
-    show_trail = params["show_trail"] if "show_trail" in params else True
+    show_trail = params["show_trail"] if "show_trail" in params else False
 
     # 使用 ursina 查看的运行效果
     # 常用快捷键： P：运行和暂停  O：重新开始  I：显示天体轨迹