insert in sources.list
deb http://proposed.packages.deepin.com/update-test  unstable main contrib non-free

I also met the same problem, added the source, useless

I try to install blumblebee nvidia driver，but It's useless too

did you try to update sources (apt-get update) and then just install nvidia-driver ?

If you once used update-test repo, you should not use it now, please change back to the official repo.

I had the same issue when trying to install the Nvidia driver on my Optimus laptop.
It installs bumblebee and some aspects of the Nvidia driver but the driver doesn't work at all.

I get the feeling that this distro is primarily tested and setup for desktop use which is fine.
On my desktop Deepin 15.4 is a gem and works ALMOST flawlessly.

For my laptop, I use Maui Linux.

After installing it will bring more problems. If you do not play the game, it is recommended not to install
This is software translation.

Can you describe it in more detail? What's the problem? Can not work Which step does the system stop?