diff --git a/sim_scenes/tri_bodies/two_bodies_02.py b/sim_scenes/tri_bodies/two_bodies_02.py
index 2818c73ae8be108c44467b097e513fa6c05011e3..7d46c9c29fd1a6e82d6e6d7cb5f7dd3d4a4bda62 100644
--- a/sim_scenes/tri_bodies/two_bodies_02.py
+++ b/sim_scenes/tri_bodies/two_bodies_02.py
@@ -12,7 +12,7 @@ from sim_scenes.func import mayavi_run, mpl_run, ursina_run
 import math
 
 if __name__ == '__main__':
-    r2 = 0.5 * AU
+    r2 = 0.02 * AU
     r1 = 2 * r2
     # A、B 质量
     mA = 5.97237e24
@@ -31,13 +31,13 @@ if __name__ == '__main__':
     vA, vB = [vxA, vyA / 1000, 0], [vxB, vyB / 1000, 0]
     # vA, vB = [0,0,0],[0,0,0]
     bodies = [
-        Sun(name="A", rotation_speed=1, mass=mA,
-            init_position=pA, init_velocity=vA, size_scale=1.5e3, distance_scale=1),
+        Earth(name="A", rotation_speed=1, mass=mA,
+            init_position=pA, init_velocity=vA, size_scale=5e1, distance_scale=1),
         Sun(name="B", rotation_speed=1, mass=mB,
-            init_position=pB, init_velocity=vB, size_scale=1.5e3, distance_scale=1)
+            init_position=pB, init_velocity=vB, size_scale=5e1, distance_scale=1)
     ]
 
     # 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
     # position = 左-右+、上+下-、前+后-
-    ursina_run(bodies, SECONDS_PER_YEAR * 50, position=(r1, r1, -7 * r2), show_trail=True)
+    ursina_run(bodies, SECONDS_PER_YEAR, position=(r1, r1, -7 * r2), show_trail=True)