There are a lot of advantages to maintaing an uptaded PPA for DDE, because much more people will use the DDE and they will be able to give more feedback for the development of the DDE and, also, the Deepin system. Furthermore, when the people will be able to taste the DDE, they can feel more attracted to taste the whole system, so that, the Deepin distribution.
中文 
Considering
I would like to reforce a sugestion: the Deepin's own organization (Wuhan Deepin Technology Co., Ltd.) kept an updated DDE PPA in real time.
DDE is the Deepin Desktop Environment, so that, the front end and the Destop System (window manager) of Deepin.
PPA is a repository system that Debian and Ubuntu flavors can add in their main repositories.
The most used Linux distributions in the World use Debian and Ubuntu flavors.
There is a PPA for DDE, but it is very outdated:
There are a lot of advantages to maintaing an uptaded PPA for DDE, because much more people will use the DDE and they will be able to give more feedback for the development of the DDE and, also, the Deepin system. Furthermore, when the people will be able to taste the DDE, they can feel more attracted to taste the whole system, so that, the Deepin distribution.
Hugs and Cheers.