Many blogs on the Internet talk about adding input methods, but fail to mention the key points.
To modify the shortcut keys for switching input methods, you can modify the keyboard shortcuts in the system settings.
It is not changed in the input method, as shown below
See [Keyboard shortcuts]/[Typing] above
The default is Super+Space [Microsoft keyboard is window key+Space],
You can modify it by double-clicking. For example, after double-clicking and pressing the Ctrl key and the Space bar in the pop-up dialog box, you will see that the shortcut key becomes Ctrl+Space.