@ferdinand Thank you very much for your help, I have solved the problem!

@ferdinand I don't quite understand what you mean, because the plugin I took the screenshot of is also in the "Extensions" menu, but it has "Group Separator".

@ferdinand I'm very sorry, but I was wondering how the separator on the screenshot is implemented? Yes, my question is in the "Extensions" menu

I registered several plugins in a .pyp file, but when I opened Cinema4D and opened the plugins menu, I found that his sorting is very bad, I want to know how to sort according to my requirements, and I want to add delimiters between the plugins, but I don't know how to do it

1、This is an example of a plug-in menu separator：
，
2、This is an example of the plugin I registered：

import c4d, random, os, webbrowser
from c4d import documents, gui, BaseContainer, storage as s, gui as g, utils as u, bitmaps
from typing import Optional
from c4d.gui import GeDialog


#  START ----------------------------- Plugins_ID ------------------------------------------------------------------------------------------------------------------------
Rig_Start_Plugins_ID = 9863771
Animation_Camera_Plugins_ID = 9863772
Add_Switch_Plugins_ID = 9863773

About_tree_Plugins_ID = 9863787
#  END ----------------------------- Plugins_ID ------------------------------------------------------------------------------------------------------------------------

#  START ----------------------------- 绑定开始 ------------------------------------------------------------------------------------------------------------------------
class Rig_Start(c4d.plugins.CommandData):
    def Execute(self, doc):

        pass

        return True

if __name__ == "__main__":
    scriptPath = os.path.split(__file__)[0]

    bmp_Rig_Start = bitmaps.BaseBitmap()
    iconPath_Rig_Start = os.path.join(scriptPath, "res", "Rig_Start.tif")
    bmp_Rig_Start.InitWith(iconPath_Rig_Start)
    
    c4d.plugins.RegisterCommandPlugin(
        id=Rig_Start_Plugins_ID,
        str="绑定开始",
        info=0,
        icon=bmp_Rig_Start,
        help="创建绑定初始层组",
        dat=Rig_Start(),

    )
#  END ----------------------------- 绑定开始 ------------------------------------------------------------------------------------------------------------------------


#  START ----------------------------- Animation_Camera ------------------------------------------------------------------------------------------------------------------------
class Animation_Camera(c4d.plugins.CommandData):
    def Execute(self, doc):

        pass

        return True

if __name__ == "__main__":
    scriptPath = os.path.split(__file__)[0]

    bmp_Animation_Camera = bitmaps.BaseBitmap()
    iconPath_Animation_Camera = os.path.join(scriptPath, "res", "Animation_Camera.tif")
    bmp_Animation_Camera.InitWith(iconPath_Animation_Camera)
    
    c4d.plugins.RegisterCommandPlugin(
        id=Animation_Camera_Plugins_ID,
        str="CameraAnimation",
        info=0,
        icon=bmp_Animation_Camera,
        help="创建动画摄像机层组",
        dat=Animation_Camera(),

    )
#  END ----------------------------- Animation_Camera ------------------------------------------------------------------------------------------------------------------------


#  START ----------------------------- 添加开关 ------------------------------------------------------------------------------------------------------------------------
class Add_Switch(c4d.plugins.CommandData):
    def Execute(self, doc):

        pass

        return True

if __name__ == "__main__":
    # 获取脚本所在目录
    scriptPath = os.path.split(__file__)[0]

    bmp_Add_Switch = bitmaps.BaseBitmap()
    iconPath_Add_Switch = os.path.join(scriptPath, "res", "Add_Switch.tif")
    bmp_Add_Switch.InitWith(iconPath_Add_Switch)
    
    c4d.plugins.RegisterCommandPlugin(
        id=Add_Switch_Plugins_ID,
        str="添加开关",
        info=0,
        icon=bmp_Add_Switch,
        help="选中层，点击添加开关！",
        dat=Add_Switch(),

    )
#  END ----------------------------- 添加开关 ------------------------------------------------------------------------------------------------------------------------

#  START ----------------------------- 关于... ------------------------------------------------------------------------------------------------------------------------
class About_tree(c4d.plugins.CommandData):
    def Execute(self, doc):

        pass

        return True
    

if __name__ == "__main__":
    # 获取脚本所在目录
    scriptPath = os.path.split(__file__)[0]

    bmp_about_tree = bitmaps.BaseBitmap()
    iconPath_about_tree = os.path.join(scriptPath, "res", "about_tree.tif")
    bmp_about_tree.InitWith(iconPath_about_tree)
    
    c4d.plugins.RegisterCommandPlugin(
        id=About_tree_Plugins_ID,
        str="关于...",
        info=0,
        icon=bmp_about_tree,
        help="使用教程及后续更新...",
        dat=About_tree(),

    )
#  END ----------------------------- 关于... ------------------------------------------------------------------------------------------------------------------------

import c4d

def main():
    
    cloner = c4d.BaseObject(c4d.Omgcloner)
    python = c4d.BaseTag(c4d.Tpython)

    cloner.InsertTag(python)
    doc.InsertObject(cloner)

    c4d.EventAdd()

if __name__ == '__main__':
    main()