diff --git a/sim_scenes/earth/earth_clouds.py b/sim_scenes/earth/earth_clouds.py
index dad6d3e7c7a0797ecae449b6fc28d2c7b12e2616..7c5fb476e695f5b9d164c78c8d501c57fc0925c3 100644
--- a/sim_scenes/earth/earth_clouds.py
+++ b/sim_scenes/earth/earth_clouds.py
@@ -8,7 +8,8 @@
 # ==============================================================================
 from bodies import Earth
 from common.consts import SECONDS_PER_HOUR, SECONDS_PER_DAY
-from sim_scenes.func import ursina_run
+from sim_scenes.func import ursina_run, create_sphere_sky
+from simulators.ursina.ursina_event import UrsinaEvent
 
 if __name__ == '__main__':
     """
@@ -29,10 +30,23 @@ if __name__ == '__main__':
 
     bodies = [earth, earth_with_clouds, clouds]
 
+    def on_ready():
+        from ursina import camera
+        # camera.fov = 30
+        # 运行前触发
+        create_sphere_sky(scale=10000).rotation_y = 220
+
+    # 订阅事件后，上面的函数功能才会起作用
+    # 运行前会触发 on_ready
+    UrsinaEvent.on_ready_subscription(on_ready)
+
     # 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_HOUR / 2,
                position=(1.5 * earth.radius, 0, -30000),
                show_grid=False,
+               cosmic_bg='',
+               show_camera_info=False,
+               show_control_info=False,
                view_closely=0.001)   # 近距离观看 view_closely=True或0.001
diff --git a/sim_scenes/func.py b/sim_scenes/func.py
index 9df018312880553194f588e2bc00276095ad023f..a226db72801da23127a1ab6184ffb0e5205d1570 100644
--- a/sim_scenes/func.py
+++ b/sim_scenes/func.py
@@ -668,7 +668,9 @@ def create_sphere_sky(texture="bg_pan.jpg", scale=8000):
     from simulators.ursina.entities.sphere_sky import SphereSky
     sky_texture = find_texture(texture, None)
     if sky_texture is not None:
-        SphereSky(texture=sky_texture).scale = scale
+        sky = SphereSky(texture=sky_texture)
+        sky.scale = scale
+        return sky
 
 
 if __name__ == '__main__':
diff --git a/sim_scenes/tri_bodies/tri_bodies_04.py b/sim_scenes/tri_bodies/tri_bodies_04.py
index 3d05b0e3b217d8284748b26cf294f4eee6cd2390..0f50cae644d3a7601a2ad96b63b4fa800cf9a961 100644
--- a/sim_scenes/tri_bodies/tri_bodies_04.py
+++ b/sim_scenes/tri_bodies/tri_bodies_04.py
@@ -8,7 +8,8 @@
 # ==============================================================================
 from bodies import Sun, Earth
 from common.consts import SECONDS_PER_DAY, SECONDS_PER_WEEK, SECONDS_PER_YEAR, AU
-from sim_scenes.func import mayavi_run, mpl_run, ursina_run
+from sim_scenes.func import mayavi_run, mpl_run, ursina_run, create_sphere_sky
+from simulators.ursina.ursina_event import UrsinaEvent
 
 if __name__ == '__main__':
     """
@@ -37,7 +38,21 @@ if __name__ == '__main__':
             size_scale=SIZE_SCALE, texture="fixed_star.png"),
     ]
 
+    def on_ready():
+        from ursina import camera
+        # camera.fov = 30
+        # 运行前触发
+        create_sphere_sky(scale=10000)
+
+    # 订阅事件后，上面的函数功能才会起作用
+    # 运行前会触发 on_ready
+    UrsinaEvent.on_ready_subscription(on_ready)
+
     # 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_WEEK, position=(0 * AU, 0, -3 * AU), show_trail=True)
+    ursina_run(bodies, SECONDS_PER_WEEK*2,
+               position=(0 * AU, 0, -3 * AU),
+               cosmic_bg='',
+               show_grid=False,
+               show_trail=True)