When English version of ubuntu configuration input, click Configure Current Input Method
You will be reported the following error:
You’re currently running Fcitx with GUI, but fcitx-configtool couldn’t be found,
the package name is usually fcitx-config-gtk, fcitx-config-gtk3 or fcitx-configtool.
Now it will open config file with default text editor.
The effect that the graphical interface can not be opened because of a lack of something, it can only be configured through a text editor
This obviously should not happen, we need to use a graphical interface to configure
The solution is to install about what it required
sudo apt-get install fcitx-config-gtk
After clicking the configuration again be able to open a graphical interface