中文 
deepin hi,ya. considering you are fresh in deepin, I guess the version you have is 20.5. Great, that goes smooth .What I would say is installing closed driver, that means, you'd better (or must) choose closed nvidia driver during the installation. BTW, I have same problems like you several days ago, resonablily, i'm rookie. Actually, we can just solve this issue precisely by run: sudo apt install nvidia-settings nvidia-smi in terminal if you have done what I said before.
Then run nvidia-smi in terminal to ensure things goes well, if output works we succed in install nvidia driver. Furthermore, consider display combination (nvidia+Intel), a slight APP: dde-dock-switch_graphics_card will give you a great help when you want to switch display strategy manually.
dde-cooperation – difficulty obtaining UOS Assistant (Android) 
Hello everyone. I am new to Deepin Linux, but I like it so far. I have just been having a really hard time installing the proper Nvidia drivers for my Sony Vaio VGN-FZ340E laptop. From running the inxi -G command, I am told that I have a GeForce 8400M GT graphics card installed. So, according to Nvidia's website (https://www.nvidia.com/en-us/drivers/unix/legacy-gpu/), I need the 340.xx driver. I was able to find the driver also on their website (https://www.nvidia.com/Download/driverResults.aspx/156163/en-us).
However, when I try to install the driver following these instructions (https://bbs.deepin.org/en/post/151191?offset=1&limit=20#reback_title), it doesn't work. It just errors out and says the instalation was unsucessful. Are these instructions outdated? What do I need to do to get this driver installed? The default Nvidia drivers from instalation are barely functional, only allowing me to choose a low resolution of 1024x768 even though my screen is 1080p. Also, whenever I wake the computer from sleep mode, it freezes. The open source drivers are even worse as they cause the computer to just freeze randomly when running normally.
Thank you in advance for your help. I hope I can get this working and don't have to look for another Linux distro. Deepin Linux does seem pretty cool otherwise.