Introducing
Technique.
UKUI's technology is mainly developed using QT language, and it is integrated on the Unicorn system by default. At present, a series of plug-ins, apps and other products have been integrated, and new 3.0 components are constantly being developed, which means that UKUI will be actively maintained, continuously tested, and constantly developed to respond to user-driven needs in the real world.

Project
Source
The git repositories for UKUI Desktop:
GIT URL
https://github.com/ukui
PPA
The packages for UKUI Desktop:
Adding this PPA to your system:
$ sudo add-apt-repository ppa:ubuntukylin-members/ukui
$ sudo apt upgrade
Or
$ sudo apt upgrade
$ curl -sL 'https://keyserver.ubuntu.com/pks/lookup&op=get&search=0x73BC8FBCF5DE40C6ADFCFFFA9C949F2093F565FF' | sudo apt-key add
$ sudo apt-add-repository 'deb http://archive.ubuntukylin.com/ukui focal main'
$ sudo apt upgrade
Note: Users who have added this PPA, please use the following command to manually downgrade language-selector to get the latest language-selector to prevent the issue (https://launchpad.net/bugs/1899376): $ sudo apt install language-selector-common=0.204.2 language-selector-gnome=0.204.2